That's exactly what's going to happen. Low prices now, wait until your business becomes dependent on it, then jack it up to whatever you need it to be.
Didn't happen with Google maps. Mapbox is definitely not 1400% cheaper. And many many people use Google maps before and after the price change. So I would disagree on both points.
Google maps has a bigger network effect and has a way bigger barrier to entry. You can train a new LLM for a few million. Good luck collecting map data on the entire world for that much.