I have no idea what he did this time. He only had this twitter account for about 10 days. There may be a few things going on.
For one, most of these services mean it when they ban you. Especially if they've had to ban you multiple times. Most of them have ways of discovering people they had to ban before and ban them again.
A second possibility is that Britbong usually doesn't make just one account. He'll make one main one where he more or less behaves, then two or three others where he does his really dodgy shit from. Youtube, Twitter and Secondlife all have ways to discover which are your alt accounts, so he might be just posting stream announcements on one account while telling people to kill themselves on others.
A third, and more interesting possibility is that Britbong has been banned from Twitter five times that I know of since the November 9th Baited Podcast, which everyone knows is about Britbong false-flagging the twitter accounts of other youtubers. In it, Keemstar talks about Karma. I'm not saying Keemstar is the one behind blacklisting Britbong on twitter, but Britbong was responsible for a lot of people losing their twitter accounts, so there's a pretty good chance one or more of them are making sure he never has a stable twitter account again.
In regards to my third point, it's interesting that one of the members of the Baited podcast visited Britbong's discord to inquire about his twitter banning:
I wouldn't call this a smoking gun that they were involved in his banning, but he's clearly rubbing it in.
Since I wrote this, Britbong's been banned on youtube yet again. He's going through about one youtube account a week. I wonder how long it'll take for him to get the hint.