Could also be for banning reasons. I.E. players that have abused the unlimited tokens glitch, they will be able to log XP amounts, and if they are too high, they look into your account finding that you have used an exploit.
Originally posted by ResistTheSun
Logging of matchmaking......hmmm i wonder why they are doing that i guess it to gain data to see if they need to change the lag comp or just matchmaking