As you mentionned earlier in a tweet and on this forum, TWP sales are not as high as they could have been in the market share of MI fans. Overall sale numbers are not low, it was just the percentage of MI fans you were reaching that was low - around 10%. (End of paraphrasing). How can you tell this? How do you collect the MI fan status for all copies being sold? Is it by gathering statistics on players discovering certain MI easter eggs in the game? Or is it something more mundane like Steam/Gog providing information on game libraries containing either game (which doesn’t include original MI owners and more piratey fans)?
(Edit:) here is a link to the tweet https://mobile.twitter.com/grumpygamer/status/917455464857604096