Key Determining Issues/Questions
1. One possible interpretation was that, at the end of the movie, when Matt was peeping at the locked Emma, it was Emma who shot him (instead of the fake cop). Re-watch that scene again and you'd know what I mean.
2. Basically, the fake cop, Travis and Matt were in cahoots (irrespective of whether they were of the same company or not). So towards the end, it CAN ALSO MAKE COMPLETE SENSE if it was Matt who killed the fake cop (instead of the other way round). Purpose? So that Matt can get the rich few clients' subscription fees all to himself (or sharing them only with Travis).
3. If all 5 can really make it after 6 months, do you think the company will honour their word in giving each of them 1 million dollars each? I seriously think so. Otherwise they won't have clients or participants in future games.