If ever you better use some online account like wise, without the costs for having it.

I think paypal can be on everyone's name and you can change the paylink + name into @worldsmile. It could be a nice extra to mntion if a post is promoted on X or just leave the address underneath a post. It can be a not Steemian will read it and decides to donate. I
I understand it's to promote Steem but it doesn't matter you shouldn't cut out other options to receive donations. Steem needs to be exchanged too before it can be used.