Don't have any data I must say, just a series of discussions here and elsewhere over the years, voicing either appreciation for the platforms above or displeasure with the logistics/price of TFcloud, e.g. with one I remember

https://old.reddit.com/r/devops/comments/eaq8bh/terraform_em...

The vast majority of projects that I've come across at work just had the tf CLI wrapped in a CI/CD pipeline + some bucket, but the managed competitors seemed to come up more often (compared to other tools/platforms) when people wanted to use/were using something as a service. Perhaps it's really just a perception thing, I never checked their financials

edit: I think I went off-track from the point. The point was that the ones selling managed versions were not the hyperscalers, but people building wrappers and similar around it. The other commenter with the list of fork-backers illustrates that nicely.