The account will not qualify for any item drops. It is these party numbers that are used rather than the individual. Matchmaking will never be perfect, and the technical details in this post refer to the current state of affairs and are likely to change as we find better approaches.
When the players on a team are sorted by adjusted rank, as they are above, the solo players tend to be bracketed above and below by players playing in parties; furthermore, a party with a smaller MMR spread party F tends to get bracketed by a party with a larger MMR spread party D.
Under certain circumstances, we may need to reactivate calibration, if we think the MMR is inaccurate. This, of course, is assuming that you get placed in lobbies that allow you to win.
We know this happens, and we've built in a small threshold to accommodate occasional abandons. Some believe in strict disciplinary action. The Conduct Summary will provide a history of the behaviors associated with Low Priority over a span of the previous 25 games that an account has played.
Like most everything else we do, matchmaking is subject to constant reevaluation. A player has been reported multiple times.
How can a Low Priority penalty be removed? Despite this, Valve sees the punishment pool as a necessary fixture to protect the community from itself.