If production C takes far less effort to earn a greater amount of money than production A, then production C naturally is chosen over A.
Same goes for Pinoy movies these days. It takes far less effort to produce Crap while earning more than it is to produce good quality films that have a smaller market.
The masa are more likely to watch Pinoy movies than other foreign films given the language barriers, so they have limited tastes when it comes to movies. Given that the Pinoy film studios are aware of that, they cater to that demand and rarely attempt to diversify or expand the preferences of their masa market by showing them a different kind of film, due to other factors involved such as the Pinoy masa's reluctance to change, or politics. And so it's a vicious cycle – the masa's taste in films remain limited and the Pinoy film studios are reluctant to innovate because there's greater guaranteed profit in remaking and recycling the same old trashy movies the masa watches.
So long as these movies have familiar names, stick to old familiar cliched plots, and the jokes are funny enough, the masa will be pleased. Mababa lang kaligayahan e.
It's quite sad really. The MMFF is supposed to be like the Cannes or Oscars of the Philippines, and it has sunken to such a low level, it needs to be discontinued.