I'm against the big variety of cosmetic options sourcing from donations.
Why someone would ask.
Because the more pay-to-get options to give to a game (any kind of it) it ends up bad and not free at the end.
There are countless wallet-warriors players as they call them in other games that they will instantly give away all the money just to be better/alterntative or god knows what else.
Me, I wouldn't really mind having more cosmetic options knowing that I won't abuse them in any way, but I can't say the same for others, no offence but I don't trust any playerbase.
Not to mention that people who really CAN'T afford any penny lost they will feel jealous or bad seeing all the cool things the 'richies' will get.
To sum up this is a free game, donations exist not because you want to take their prize but because you really feel that those people working on this game, who have no obligation to do so, are doing a shitload of good job and they deserve a prize, not you.
The more pay-to-win options a game has the less it serves its true purpose.
Then again if the matter is just fact that we need more donation options then fair enough, have it possible to give away,5$,10$15$ or whatever amount you want, there is no need for a payback prize to everything.
That's all I gotta say, then again this is just my opinion.