Annoying silencer contracts

Been playing this off & on since it came out. Just started playing last week after about a year. I dont want to spend money on a game, but it seems 60% of contracts require the silencer. Which cost credits which cost money. The free credits for watching videos is no longer an option apparently. Now Im stuck waiting for my 5 silencer contracts to expire and reset. If I get another silencer mission, Ill delete and go find another game.

Fart!!! about Contract Killer, v1.5.2