I have to tend to Agree with those that say they dont like the idea, Sure its a quick fix to the lag, but why not open a donations page and upgrade the servers to Handel more people. I would gladly pay a few bucks to help upgrade the servers so Everyone can enjoy Feral Hearts. it doesn't even have to be a permanent Donations page, set a mark or goal of the money you need to upgrade the servers to sustain a certain amount people at once, the once that goal is reached you can close the donations. Repeat if needed.
No rewards need to be given imo though with Feral Hearts Rewards for donations dont really effect game play.