Maybe, rather, an option to choose if they think it’s ok to get a card from who you sent to, or to send to someone who sent to you, and if both agree, their address can be shared this way.
Personally, I don’t want that. It already can happen if a person has multiple accounts, or if a card expires.
I especially like this the way it is now, no relationship, only this one time “meet”, and that’s it.
Like how do you treat a stranger, when you don’t expect/get anything in return.
You’ve got a point here…
Actually I’d also very much dislike a situation in which I’d get a “chance to retaliate” for a “bad card”… I had really only thought of the reverse situation, that
But the truth is, if somebody sent me a “trashy card”, I’d rather NOT get their address. Just forget about it and move on 
Even if there would be a chance to be matched again, what are the odds of that hapenning with this many users? If might happen with the “rare” countries but with everyone else… I’m not sure about that. And to be honest, I wouldn’t remember if I already received a card from someone whose address I draw if there wasn’t anything “special” about that card. And I mean not just a great card and message, but really special. It could also be years in between.
But I wouldn’t mind it being possible. In my case I wouldn’t even be able to retaliate a “bad card” because I wouldn’t know that that person sent me one a while ago. And also because I enjoy picking and writing the card, so I wouldn’t be mean as a move of revenge anyways. With that I would just take the fun out of it and Kind of hurt myself…
I wouldn’t mind if this was implemented, but I really don’t see the arguments you mentioned becoming a reality. Someone trying to not be too difficult just because there’s a very thin possibility that the person they send a card to might send them a card later? Maybe I just don’t have enough imagination, but I don’t see how that could deter someone.
Just like the comment above mine, if I were to get an address for someone that I have received a card from or if I were to receive a card from someone who I sent a card to, I probably wouldn’t even notice that we’ve had an interaction before, so if this was implemented, it wouldn’t change anything for me.
I think Superchick is the one with the multiple accounts since she said she sent over 1500 cards, but her account only shows 219 sent.
I recommend checking out postcard united if this is a pet peeve. I got cards multiple times from the same people and decided it wasn’t worth it anymore, but if that’s something you’re interested in you’ll love the site
I might be wrong but you can match with the same person more than twice, but for that to happen everyone else needs to be either on travel mode or have received more cards than has sent; which currently is impossible.
For the contact is made and both of yor are free to exchange addresses via pm, so that both of you can stay in contact via postcards.
Do you mean because in the early days many cards traveled between Ana and Paulo? 
I think the algorithm probably wasn’t the same as today then. They were also sending inside the same city if I remember correctly, and that’s not possible anymore. I guess Paulo probably changed a few things after some time. 
But of course I can’t know for sure, that’s just guesses! The algorithm’s magic is beyond my knowledge. 
I really don’t think so… I don’t know about travel mode but I always thought that you get one interaction with one account and that’s it, forever (unless there are multiple accounts of course).
Having more received than sent is very much possible and doesn’t change anything. Or am I misunderstanding?
In my opinion… It isn’t broken, why fix it? I do like the randomness and one-time interaction, and it is one of the strong characteristics that make postcrossing what it is. In a sense, it wouldn’t matter a lot to me personally if this changed, but it would be different “philosophically” if that makes sense.
This! 
I agree with you.
Don’t get me wrong I agree with you, the system is fine.
I was just saying that in the limit situation, that are only 2 active users (A and B); A only sends to B and B only sends to A.
The only situation that the system wouldn’t give you an address is when you are the only user.
Oh, but if I remember correctly, it happened to Malaysian users some time ago! They could pretty much only send to Singapore and when there was no Singaporean address available, it said “there are no addresses to draw” or similar. At least I think I remember it.
Edit: Found it!
Interesting, it seems i was wrong.
Why not read the whole post before you comment?
It actually includes the answers to your questions 
And I don’t think that your preferences are the reason for the state of affairs - which was what I was asking for… And received sufficient answer, by the way, so by now I actually share your preferences.
Two years ago I sent a card to Hong Kong and two years later I received one from the same person! But he was not aware of that, because my card was lost. Has anyone experienced this?
I sent a card to someone (it eventually expired). Then I received a card from him, but it was his second account, so not exactly the same as your situation. Still, funny and weird feeling, that we have had cards travelling to each others at the same time.
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I received two cards at the same time, both boring generic images, identical generic message, same handwriting, one from a man, the other from a woman - in other words one person, two accounts. Thank goodness I won’t be receiving any more junk from this postcrosser ( unless they have more accounts), nor will I ever have to send them anything. Let’s keep the system as it is!