There are a lot of politicians, activists, fundraisers, etc who communicate primarily through Twitter but send people to Patreon or GoFundMe or somewhere else to donate. That's an existing culture of soliciting donations on Twitter, and Twitter might be able to become the payment processor for some of those donations, if they do it right.
Twitter is for building an audience. Patreon and other platforms are where you best monetize that audience.
Putting both together could be incredibly lucrative but also would be treated very cautiously because of potential deplatforming.
Musk actual commitment to minimal moderation (what my mental model is for his free speech bent) could thread that needle and at the very least be a fascinating experiment to watch from the sidelines.
