If you choose to build a platform that is dependent on third-party data and APIs, then you choose to accept whatever choices those third parties make that could possibly affect your application.
The whole "craigslist doesn't innovate" argument is moot. If they were selling buggy whips at a million dollar revenue rate a month, someone out there would attempt to get in that same business, copy it, mimik it, resell it, etc.
Innovators create stuff that people want to copy or leach off of. Poseurs copy and leach off of innovators.