TBH, if it were me, I'd probably be using something like playwrite/puppeteer against a real instance of Chrome browser. I mean, you won't get the scale/throughput of the Enterprise API, but probably good enough with browser profiles to be able to mostly fool Twitter and do what you need/want.
That said, the free tier is probably good enough if you're relaying posts/information for most legit users, and the $100/month tier probably isn't good enough for businesses centered around deep Twitter API usage. Probably a net positive for society overall.
Aside: I'd rather pay $5-10/month for an ad free experience (there's so many of them now) than the blue checkmark and related features.