What you doubt doesn't matter, google clearly even requires you to fill out details about the testing process, how you recreuited your testers, etc. [0]. This is mandatory. Good luck trying to fill in "I used Fiverr to recruit some chinese clickworkers". Any if you are lying about the process - well If Google doesn't like your App or anything about you in the future, they can just delete whatever your App is citing false claims on your side.

[0]: https://support.google.com/googleplay/android-developer/answ...