This is most likely to happen. I also think there's a strong possibility they are doing this to combat all the addons which block premium users. Those are staggeringly effective at messing up suggestion algorithm.
Very specific use case. I use it for tech support for some companies in my country. They ignore emails and phone lines, but Twitter they don't. Other than that, I have no reason to use it, nor do I use it.
On a social network like that, where anyone can see and partake in any conversation, asking an open question or reporting any kind of issue makes it impossible for companies to ignore. Sending them email and getting no response could result in me getting upset, maybe changing company and telling my friends, majority of who won't do anything in regards to that. Exposing company for not being helpful or service disruption can escalate quite rapidly on networks where people can share your post without much effort, regardless of the fact if it's true or not.
So, I abuse that fact. I don't send them DMs I call them out publicly. It's so stupidly effective.
The problem is the CPU effort it takes to produce 100 Xits for your timeline, then search that list for everyone on your blocklist, remove those Xits, then possibly go back to the suggestion API to get more since there are only 40 Xits left, etc. etc. is cost prohibitive... Especially when you have millions of users with thousands of accounts on their blocklists.
As a little more background, the letter 'X' can be pronounced as "sh" in a lot of languages, turning tweets into 'zits' or 'shits'. I like 'Xitter' as a pejorative, pronounced 'Shitter'.