Tell that to Sunny Singh, the other Vimeo user who was featured in the Verge article, who did the math himself and had to admit that he was costing Vimeo $2500/yr.
If so, he is not saying that he is costing Vimeo $2500/year, he is saying what amount of bandwidth he has "consumed"/"produced" from Vimeo, which for sure doesn't cost Vimeo $2500/year, as otherwise they would be bankrupt by now. They pay static sums for the internet connection, no TB/$ crap that people using cloud are used to.
A customer shouldn't really need to concern themselves with the profitability of a service provider though. The price Vimeo demanding is reasonable - what's not reasonable is hiding that prices could increase, and being basically as opaque as possible about the conditions to trigger that increase and what the increased cost was.
Your comment is false. Singh did an analysis and used the analysis to negotiate to a $2,500/year rate. He didn't "admit" anything about what it could be costing Vimeo.
This also seems like a great way to get everyone to leave. If what I wanted was a B2B platform, I wouldn't choose one with a history of suddenly changing its policies and only giving one week to catch up.
In fact, it's often much more difficult for a larger business to move that quickly than an independent user.
"We want you to leave" is a pretty ok thing for them to say. "You have a week to leave" is not. It's sleazy and unprofessional, and it's a signal that it's best for anyone to avoid them in the future.
they probably don’t want to be known as forcing users out unilaterally, so a false offer becomes the diplomatic move, now backfiring from public exposure.
coupled with the "we are a B2B solution" statement, i think they're trying to shake down patreon, not the individual creators - it sounds like vimeo wants patreon to start sending them money.