When Valve first introduced ranked play to Deadlock the player distribution was a little funky. Seeing that Deadlock was and is still in closed beta, this was to be expected, but still, instead of the normal bell curve, players were spread out across all the ranks. It was a little chaotic to begin with, but over time, things have seemed to settle down, at least for most of us...
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Deadlock's ranked play has improved quite a bit since its arrival, but a small quirk has left only 75 people down at the bottom rank to battle it out
Source: PC Gamer (opens in a new tab)