in case of ads:
Construct 2 have much less profitable $$$ methods comparing to native Java developers (entry ads, exit ads, floating ads, Pay Per Install SDK etc.) so every C2 app will earn less than Java app (slow PhoneGap is not solution)
anyway my general advice is: do the games. If one not succedd - do another.
put them on Google Play and Amazon AppStore (Samsung Apps sucks because they allow only 'their' ads SDK or paid apps)
if app is really good quality - then do marketing :)
sooner or later it will bring income