Mostly manufactured spend and not counting miles and points earned through travel or credit card churning signup bonuses...:

100k UR across 2xIB and 2x Ink-plus @ office stores
30k HH @ drug stores (ending soon sadly)
10k AA using Bankdirect
2k AP (Various programs)

500k-1 MM /Year through credit card churning that include wife .

Like what others said these are NOT free and it cost ALOT of time and effort (like a part time second job) and also cost some fees but its worth it if you want to travel in style and visit places you never dreamed of.

Having said that there is always a risk of being shut down/financial reviews /closure of accounts using these methods ...