How do you all have so many Gems????

I am borderline obsessed with AB Transformers. I play every day longer than I'd like to admit but whatever...its fun. The thing that keeps stopping my progress is Gems. After reading some of these topics/posts I am shocked at how many people have literally hundreds of gems whereas I have never had more than I dunno 30??? Are you buying them? using a cheat code? I feel like I'm successfully crushing every task in nodes, competitions, getting at least 4 keys on missions, lots of completed tropies, etc. I am at level 75ish I believe, Silo at level 11, several level 8 TFs...I'm not saying I'm the best but I can seem to get enough gems to really match the progress I am seeing from some of you guys. What is the best way to beef up my Gem count??