I think any "value add" business that has a primary product built on top of another larger business' non-commodity service(s) runs the risk of having to re-do their pricing in ways that are outside their control.

This is nothing new. I'm not sure if it's "anti-consumer" as much as it's just a risky play from a brand and customer happiness viewpoint. Because your prices can be forced up by your supplier, and your customers will be mad at you, not at your supplier.

I do also think it is on consumers - in some part - to go into it with eyes open and do their research.

Thankfully a product like Cursor is a monthly sub and not a big up-front investment so if you don't like - or can't afford - the new pricing, you can just stop paying.