The age of an account doesn't govern the success of a project, the people behind it does. I'm going to assume you didn't click any links or even read anything pertaining to Chris, did you?

It is backed by the game since it will be used by the game as well as other games developed by Chris's brand. It's not pay to win in the slightest. The ability to spend money on a game to purchase visual changes that don't affect the power balance completely fits the free to play model. For example, League of Legends which sells skins (cosmetics; exactly the same concept) is not pay to win.

I feel like you're failing to understand another aspect of this. It's not like Chris downloaded some arbitrary source code of the internet, he has written everything himself from ground zero and proven himself to be an amazing coder. Apex is over 60,000 lines written entirely by Chris himself and others that worked with him directly on his project.