I can't emphasize this enough. Grimoire progress absolutely [i]shouldn't[/i] be obtained through private matchmaking. No other game allows progress in custom matches because it promotes boosting, so why should Destiny be any different? This is going to completely destroy leaderboards, legitimate KD's/wins, and legitimate kills/medals earned in the Crucible. On behalf of the Grandmasters of Grimoire, I'd like to ask Bungie to change this. We're a relatively small group that has earned our way to the maximum grimoire score, and I'd hate to see all the effort we put into our Crucible wins (Rumble requiring the most effort) to end up being for nothing. We hope that one day there will be a reward for reaching Grimoire milestones and any form of boosting would ruin the uniqueness of said items. I hope this message is seen by the devs at Bungie, and I hope action is taken. -Me