The US is weird with tipping. I might be totally misinformed/tunnel vision (my sister works as a waitress though) but I have heard of quite a few instances where tips are counted as the actual pay of the server, so there's a deduction and etc. which makes you a huge ~euphimism~ doo doo donk face if you don't tip. Reversely, I hear in a lot of other countries, tipping is considered an act of pity/charity or at least not normal.
So it's way different from tipping in ACNL imo. Here, it's just a solid way of saying thanks. I try to tip for every service I am given, I think it's just the polite thing to do. If you force people to "tip" you, despite the fact you did not clarify that it was mandatory and the majority chance is they did not damage your town or cause you any extra trouble (you're not forced to let people sell), then I just, no. Like others said, just say "give me 10%" or whatever in your original post and I'm sure most of the people who post to sell will be fine with that. Tipping is a kind act, not a professional one here as far as I can tell.
So it's way different from tipping in ACNL imo. Here, it's just a solid way of saying thanks. I try to tip for every service I am given, I think it's just the polite thing to do. If you force people to "tip" you, despite the fact you did not clarify that it was mandatory and the majority chance is they did not damage your town or cause you any extra trouble (you're not forced to let people sell), then I just, no. Like others said, just say "give me 10%" or whatever in your original post and I'm sure most of the people who post to sell will be fine with that. Tipping is a kind act, not a professional one here as far as I can tell.