Drops? up to 4 a week, random, you can idle in a 'drop server' if you don't have time to play
Betting? you need to actually know the scene well to profit from betting in the long term, which takes a lot of time esp. if you're new to the pro scene
Trading up? making fellow players accept deals that are unfavorable to them, basically duping them. might take a lot of time and is very unenjoyable
what more is there to know?