What exactly are Ad cards?

[bom_dia]

there is a discussion about this here:

What are advertising cards?

I have been seeing people on their profiles say they don’t want promotional cards or advertising cards. What constitutes as an advertising card? I got postcards made by graphic artists here and some of them link their shop or social media at the back of the postcard. Is that bad? I think their cards are pretty and I wanted to share that with some friends. I personally don’t find that a terrible thing, coz if I got one and liked their art I’d love to go to their shop and search for more. While…