Well, this is a pretty high rate server. We try to interfere as little as possible with aspects such as XP/SP/Adena etc. using commands, so we’d rather not provide levels through donations.
If we were to ever make such a thing, it would be a SET amount of experience, so that people wouldn’t be able to abuse it (i.e. die a lot and just buy some XP). Even though it would be good for us making money, it would suck for the server. After we get a few high levels and donations are open, we might consider such a feature but we can’t promise anything yet.
Having said that, donations are actually still closed so even if we did have such a function you wouldn’t be able to donate for it yet, as we want to build an economy on the server first before handing out gear to everyone.