Earlier quoted context omitted.
The account in question posted 76 tweets in under 30 mins. Have you posted with this level of frequency, from different IPs? You may not need to worry if you have not.
> Have you posted with this level of frequency, from different IPs? I don't know, maybe? I tend to tweet along with Apple keynotes, for example. My IP changes whenever I switch from wifi to cellular.
> For the record, this is a new account that has posted a bunch of links (all Stratechery interviews) in a short amount of time, from multiple locations around the world.
It seems obvious that the tweets were automated -- during some periods, it tweeted every ~10 seconds. If it were switching IPs at that same rate, especially if the IPs were in known AWS/Azure/etc ranges, then it's obviously not going to be authentic human activity.
In your personal situation, even if you had IP changes between every tweet -- I assume your account has some tenure, and is more than just a few days old? Twitter keeps track of all the IPs you've ever logged in from, and for older known accounts, there's probably more tolerance for weird activity (e.g. bouncing between VPNs) than a days-old account that has done nothing but suspicious spam.