That's a bit of my point. At any time your business model can get interrupted when you're doing things "that the big company isn't, but holds the gate to".

Big company might get more aggressive and make your life harder developing. Big company might get less gatekeeper and open up the gates so now you have more competition. Big company might do it themselves and add interoperability and now your product is almost useless.

It's a business model that works to get to some point, and then exit as soon as possible, IMO.