Red flags are always free. Upfront anyway. You pay for them at an unexpected time in unpleasant ways later. So feel free to have as many as Unity is providing. 😊
This needs to be adapted into a three part movie (think Creepshow) where a seemingly innocuous vendor selling flags rather than balloons is the "host" and the people who buy red ones get them free...but "You pay for them at an unexpected time in unpleasant ways later." And all the parts are just FULL of red flags the characters don't see but the audience does (as per usual in most horror films).