[Col Frank Slade]

Make them pay a subscription fee.

What a novel concept..

[Retrofitted]

Make them buy a resource (oh, I don't know, let's say a Twit-Coin), then pay for services with the Twit-coin. Back said Twit-Coin with a crypto you own a ton of (let's say, Doge), then control your own Twit-economy by managing both the cost of the resource and the cost of the service.

Don't know if it'll happen, but I can guarantee Musk had that thought. ;)