Love the game but have a few questions

1. What spawns a Jackbot in crossfire mode? Is it random?
2. What is the benefit of leveling up?

I think Jack Bots are random

Leveling up allows you to buy custom classes, that is what I have seen so far.

More custom classes, is that it?

"leveling up" happens automatically as you earn cash. Cash lets you purchase custom classes, pro-tags, and eventually other stuff too, I'm sure.

Don't sleep on custom classes though, it wasnt until I was able to customize a character that I really came into my own.

1. Jackbots spawn at set intervals. About every 5 minutes. They spawn on opposite sides.

2. There is no benefit. It's a measure of how much lifetime earnings you have.