I know a lot of people here yell and scream about P2L and profiting from 'something that's meant to be free', and I used to agree...but then eventually I realised it's a good thing.
Money motivates staff to make their tracker better than everyone else's, or at least offer members something they want.
P2L lets lazy/unpriveleged members keep leeching, and gives desperate members a chance at keeping their account.
It makes it easier for others to seed, gives relief to an overseeded site.
It lets a site run a better server, or dedicate a seedbox to the site, etc.
If you don't want to pay, you don't have to...what's the big problem with an admin profiting...seriously??
Several of the notorious donation snatching sites, TL/SCT/Bitmetv etc, also happen to be at the top of their fields. Of course it will only work positively in a very good tracker, but if you're stupid enough to donate to a new site hoping to get reap mega dividends later, then that's your own problem.
I've never given a cent to a tracker before, but this is how it seems to me.