The number of shorts has risen since two weeks ago...anyone who has placed a short during that time did so, and least during the last week, against a rising shareprice.
It takes big kahunas to do that, because the shareprice can continue to rise to infinity which inflicts a lot of pain on a short.
Anyways, to each his own, they'll have to cover eventually, and if they use their warrants to do so, good for all of us.