Unlike in PS3, many of them now have trophies, or instead of being there emulated they are remastered or remade.
False, none of the third party psone and psp games have trophies its only the first parties so far.
Regarding PS1/PS2/PSP classics, we saw the PSN sales of all the 1st party ones in all platforms and basically nobody buys them. So that's the reason of why companies don't put more there: because most players aren't interested on them.
Because there is no advertising for it at all, look at Nintendo each time they add classic games they give it its own cool trailer, why doesn't sony have something like this?
Sony is just tossing these games away with not a care in the world. Seriously im really questioning Sony Management.