I don't have a problem with people asking for tips in an unobtrusive way. Even when it is obtrusive, I really can't bring myself to care much. The great thing about the indie web is if someone is asking for tips in an annoying, obtrusive way, I can just leave their site. Unlike modern social media where you have no direct control over what you see. Obviously I'd prefer if people weren't annoying about it but I have so much more control over what I interact with that it can't really become a problem for me.