I think they may have been either servicing the snow machines or the pistee beasties. That snow wpuld have been pushed down the hill. It hasnt come from the sky!!
The difference in the webcams is just altitude. Bansko webams being a lot higher than the village one at Boro.
At Boro, there will be still loadsa snow at the top of the gondola. I think it was Fraser and Sarah (?that right?) said Boro would open top lifts if people turned up.
Its an old pic look at some of the pics from the last few days, pay paticular attention to the bottom left at the patch of snow Not there yesterday, here today, and gone again HMMMM FAKE