Well, CTime would have made 3 million instead of 2 million, if that VP had been kept closer to 90%. For an example, if they let the VP get down even lower, their votes will be worth less and less... right down to zero. Same with their income from curation rewards. Another 30 full votes and they're at 0, and would be making nothing at all on Blurt despite having invested a lot here. So VP really matters.
It's a bot, and bots vote by algorithm instead of manually. If I was the controller of that bot, I might decrease the weight given to each post, to keep the VP higher. But I think CTime is owned by someone else (I don't know who), and that person may have other curation projects going on Blurt. In that case, the "lost" income caused by low VP on this account, would be made up by taking a larger portion of the rewards pool with their other curation account(s).
I notice that CTime delegates 100k BP to UpvU, which is kinda interesting.