I dont think this is the best idea because that's what the black market is for, if there was ads system for it then a lot of people would just be selling the exact same stuff and it will get annoying after sometime, just like during the purge night
There’s a beach market and people still use the ads and people can easily just go to beach market people will still use the black market if there was a ad spot for it
Bro, beach market does the exact same thing and people still use both ways to buy and sell goods, so frolickz idea is good. People would use black market and a black market ad system.