Declined publisher offer

An author acquisition representative of a course platform contacted me offering to sell my book or convert it to a course.

It's not clear whether they're a publisher or a distribution channel. But I declined anyway because I want to remain fully independent, as well as retain full ownership and control of my work. I'm not even sure whether the offer is legitimate and the platform reputable.

The bottom line is if I got on someone's radar, such an offer somehow validates my work.