Sure, but the commenter said that this has been operating procedure for Twitter. But that does not seem to be true -- mastodon links have not been (soft) censored up until this point.
I was responding to the question about what link OP was trying to draw between BitChute and Mastodon, no idea at all about the second question re censoring Mastodon links on Twitter.
But again, responding to your parallel comment, OP is not saying that BitChute is a competitor to Twitter. It's that entrenched player <a> is (soft) censoring new competitor <b> where <a>, <b> are filled in with (Google/YT, BitChute) and (Twitter, Mastodon).
That's the most charitable read I could come up with, too. It's such a tenuous connection, though, that one wonders why it's even worth mentioning in this context.
But again, responding to your parallel comment, OP is not saying that BitChute is a competitor to Twitter. It's that entrenched player <a> is (soft) censoring new competitor <b> where <a>, <b> are filled in with (Google/YT, BitChute) and (Twitter, Mastodon).