Yes, but no.
On a Flightsim website I use, they have a thing; if you donate the colour of your name changes to a fluro colour.
It shouldn't be mandatory, but it would be good for members to donate, and somhow their profile/name or whatever is illuminated in some way.
The forum I use, they have alot of things to run, like multiplayer sever etc, so everymonth they have a quota to fill; which is £200. Which is always filled up every month, by members happily donating.