How big of a mistake did Overkill Software make with Payday 2 and including mircotransactions?

Featured Music: Awesomenauts - https://sonicpicnic.bandcamp.com/album/awesomenauts

Fastfall: Dustforce OST - https://lifeformed.bandcamp.com/album/fastfall

Intro/Outro Music: "The Lift" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/by/3.0/