As the CEO siad, they have $700MM so they have no reason whatsoever to call the warrants in the near future. However, it is up to a $250MM+/- cash on hand if they needed to rake in cash and if the mechanics of a cashless excersise are hard enough.
The company would rather see them expire than redeemed cashlessly (less dilution) and from what I have read can't prevent cashless exercise.
This is a non-story to drive down the price and cover. I personally think it is overpriced, but I'll sit on my warrants until it is more overpriced...