given how much money GTA online make and how much of a problem slow loading times are, I think he deserves way more.
Imagine going through all that effort into finding a critical vulnerability and developing a zero-click PoC exploit to jailbreak the current iDevice line-up and somehow end up selling it to Apple for $10k.
That is pretty much near to what you are seeing here with the effort into discovering this performance issue and providing a fix for it to Rockstar. Oh well.