Patreon is nominally about donations, but depending on your level of support, you get different "rewards" for your money. I believe that they were originally f

Patreon is nominally about donations, but depending on your level of support, you get different "rewards" for your money. I believe that they were originally for just providing swag - Send a creator a few bucks, and they'll send you a few stickers, send them a bunch and they'll send you an autographed piece. But many Patreon pages offer real features at certain tiers: real products as rewards, exclusive access to materials, or, in this case, exclusive functions from the service. > Power User > $7 or more per month ∙ 0 of 25 patrons > As a Power User, you'll get access to exclusive features such as the ability to monitor for common keywords and a higher daily hit limit. I'm actively working on adding new features too. It's like a subscription, but with slightly less of a service guarantee. It's just a convenient way to get paid. The page does say "The service is completely free. There is no artificially low usage limit, and there is no up-sell." and he could do a better job of monetizing it by, say, limiting each account to 50 free notifications and requiring registration of a new account after that or offering an up-sell to a $1 paid tier. If you want to let some people use it casually for free, it's really hard to charge others who would be willing to pay more.