Oh. Sorry i misunderstood. Well... i think a good point to start might be searching for Visa/Masterdar terms of services. Or at least what terms they make itch to follow. That way you can know what to and not to do (witch sucks because is a big creative limitation if you, for example, wanna talk about a 'hard theme' in a game) So.....
¯\_(ツ)_/¯
try to have a cold mindset? Like you say, is better try than doing nothing.