EA skate dying was it's own fault.
Number 1 was sick.
Number 2 instead of improving the city and making ledges that glitched out skateable they add security and cap spots because when we go to play a game I want to have spots unskateable and have stupid ass AI stop to watch me and give me props. The fuckin AI stand in the way of sets to watch you and the longer you skate a spot the more that show up.
Number 3 was ok but instead of learning from mistakes of previous games and improving the AI, the realistic-ness of the physics, and the style of spots(i.e. size of handrails, glitching of ledges with curbs under them, etc. I could name 30 more things) they just made a new city, added extra tricks, a little better graphics to Skate 1.
How to make money and keep the game alive
They need a Skate 4 where they work on the size & steepness of handrails so you can turn out of lips on half the rails; make the physics of grinding & manualling more realistic and not have prefect balance; make a turn off fucking pedestrians and don't have them stop to give you props(you faggots don't need that shit in a game or even real life. Skate because you like it or quit); make flip tricks change depending on how you flick the controller stick.
Last they instead of new games just sell updates of major cities with their spots. (Barcelona, LA, Boston, New York, Toronto, etc.) That you can DL and add to you console.
Some much more could be done. That is just a few things