I don't mind the idea of a donator forum or donator benefits, but $5 a month is really steep. I was going to donate, but I want to contribute to the community, not pay for a subscription.
Donation isn't a product. You shouldn't try to sell it. You just provide a good cause and let it come naturally.
Furthermore, the fact that literally none of the benefits are permanent isn't very appealing. I would be more inclined to subscribe if I got something lasting out of kit.
But real talk, if you want to sell something, sell name filters. Verumae -> Our Based Savior. Bernkastel -> Weeb. Cubie -> Intelligent Cube.