Earlier this month, Spotify revealed that it had begun cracking down on people using hacked versions of apps. These apps allowed users with free accounts to suppress advertising and take advantage of paid features. Now, Spotify has disclosed just how many people have been taking advantage of this hack: around 2 million users. Engadget reports: That’s not an insignificant number, and it’s understandable why Spotify is cracking down on them. As the company explains in an amended F1 filing with the SEC this week, these users forced the company to adjust its metrics and key performance indicators. The disclosure notes, “Unauthorized access to our Service may cause us to misstate key performance indicators, which once discovered, corrected, and disclosed, could undermine investor confidence in the integrity of our key performance indicators and could cause our stock price to drop significantly.” As a result, Spotify has adjusted its monthly active users from 159 million at the end of 2017 to 157 million.