This wiki is free - we don't run ads, we don't charge for access, and we don't expect you to buy anything in order to help pay the bills. And that's the same arrangement that we have with our wiki host, Miraheze.
But running a wiki costs money. Not a lot of money for each wiki when spread out over thousands of wikis, but it adds up. And we are one of the larger wikis on Miraheze.
If you'd like to help pay those costs - and this is completely voluntary - please visit Miraheze's "Donate" page to learn how.