https://www.polygon.com/2018/9/2/17811338/destiny-2-forsaken-gambit-mode-quitter-penalties-join-in-progress

During the Gambit free trial, the Destiny 2 subreddit was mostly filled with positive messages to the developers of the game’s upcoming expansion, Forsaken. But some players had some criticisms, mostly regarding their experiences with other players quitting, and never getting replacements for missing teammates. Bungie has since responded, and quelled the fears of excited Gambit players everywhere.

According to Reddit comments from Peter Sarrett, a senior technical designer at Bungie, Gambit will be released with penalties for players who quit in the middle of matches. Perhaps more importantly, Gambit will also offer a join-in-progress feature, which will replace team members who are missing for any reason.