And everyone is forgetting their unpaid hours they did for getting it off the ground.

You still need support for all of your users and actual sales. Which is also work.

Users can ask for a refund if your cloud goes down.

I would also rephrase "once you reach success" to "if you reach success"

The statement is also not valid for consultants, only for business owners with SAAS products/licenses.

TLDR; you're statement is largely false. Success != Luck