1. They are both online at the same time all the time.
2. Very, very close allies since the beginning of the game.
3. Zazke selflessly helps red even though he will lose by doing so.
4. They both gave each other medals on their first game (suspicious and also not sure why they did this)
5. Ganapifi makes some incredibly coordinated attacks even when my outposts are outside sonar range.
6. Constant gifts to one another.
EDIT: Hmmm, seems like instead on images it just says 'Image'. Is this the case for everyone or do you see the screenshots?
Overall just suspicious but I must say he/she did a very good job at hiding their tracks. Purchasing L2 on first game, getting medals are both things I have never seen a multiboxer do.