Not really just about numbers is it, the Daka signing made sense in terms of profile, had he had one good season in the prem we'd of likely made a profit on him.
Ayew came in at a time when we were already up against it with regards to PSR, so rather then go back to buying young players who we can give a platform and try to sell, we signed Ayew, which you could maybe make a case for if he was a game changer despite his age but he isn't