Hmm. Twitter seems to have blacklisted URLs pointing to "ioc.exchange", at least in DMs. Names of other Mastodon instances that I've tried seem to work.
@mattblaze This has happened many times in the past in DMs, it seems it's anti-spam or something just going wild. I wouldn't see a conspiracy into it...yet.
@g @mattblaze yeah, I think this is a non story. Some benign but maybe slightly mis-coded anti-fraud code being re-noticed and interpreted in a negative light.
@g @mattblaze Yeah, Twitter's automated anti-spam has been known to be overactive for a while. I fully expect it to be much worse now that there aren't any humans checking on it.