I have played this game on and off since 2014. The reality is it's a casino built around an MMO. There is no level limit!!! but the problem is that the bigger the mob you kill the higher the (real world) cost of the ammo and other decay costs.
The loot is ALWAYS less than the cost of a kill (mine, craft etc). The only way to get a profit from an action is if you get a global loot which in most cases still doesn't cover the whole cost of an activity.
It's really just the most expensive MMO to date that uses casino tactics to keep suckers coming back for more.
The other thing is people say you need to invest in order to make money.... ROFL, the more you invest the more you lose. I've "invested" over $3000 to date and still have less than $5 in game as of right now.