I think you should probably add all businesses that promise to sell products for SD/steem without need to confirm it in the chat. Or maybe you can send them email and ask for more information?
There is still so few of businesses that it's not a big deal to remove them afterwards if it turns out that they are not actually selling anything.
Yeah! You are right, I'll do it that way for the businesses I find they are accepting STEEM payments. BTW I have added the german construction company so 5 venues now and 4 of those are in Germany!