It is a source of revenue and it isn't a "donation". Making a donation, as I've understood since I learned to speak English, doesn't entitle the person a "gift" or some compensation. That would be known as a "shop". However, I'm a hypocrite if I say I don't call them donations. Either way, I feel that the revenue accumulated should STRICTLY be used on nothing more than server finances. Otherwise, I feel that is very greedy - generally, you can spot greedy server owners based on what they are selling (EX: Sleipnir for 40$... but wait, there's more...). Just my opinion.