All 1400 buyers could be satisfied with just 1 share that gets resold 1400 times. At even 20/share, some of the people who loaned out their shares to short-sellers are going to sell their shares when they get them back to cash in on the 1000% gains.
They could even be satisfied with 0 shares if someone is willing to short-sell. At 400/share, there were certainly plenty of people willing to short-sell.
All 1400 buyers could be satisfied with just 1 share that gets resold 1400 times. At even 20/share, some of the people who loaned out their shares to short-sellers are going to sell their shares when they get them back to cash in on the 1000% gains.
They could even be satisfied with 0 shares if someone is willing to short-sell. At 400/share, there were certainly plenty of people willing to short-sell.