A few months ago I created an account for a website I have, followed a few accounts, tweeted once and was then banned for literally no reason. All of this happened in less than 24h.
After that, I try to avoid Twitter when possible.
It's also a cesspool of entitled pseudo-intellectuals (both left and right leaning), so I don't miss it much, honestly.
My view is always a bit alien, but I get the sense if you follow the wrong person out of curiosity you get banned, which takes on weird reputation risk in itself. It seems like a vice anyway. A strange game, the only way to win is to be like everyone else.
I signed up and was immediately banned after following 3 different accounts in fairly rapid succession. I had already been "following" these accounts for some time by directly going to their twitter pages on the website and had them bookmarked, so I just went to each person directly from the bookmarks and hit "follow." This is apparently "Unusual activity." In order to prove I wasn't a bot and continue to use their service, they wanted my phone number (I signed up through the website and don't want the app on my phone). I really don't care about tweeting myself and it was just for the convenience factor of having the accounts all in a single place without having to go to different bookmarks each time, so it's not a big deal to not have an account. It's all publicly available, although they're trying to make it harder to navigate twitter unless you have an account and signed in.
Twitter never doesn't decide it needs your phone number after a short while. Nothing you did or didn't do made that happen. At most you sped it up a couple days.
After that, I try to avoid Twitter when possible.
It's also a cesspool of entitled pseudo-intellectuals (both left and right leaning), so I don't miss it much, honestly.