It looks like HF is having a seasonal 25% promo.
Reminds me of Ore-Mine.org who also had a "sale" prior to their demise

Dont be so negative. Maybe they simply need more funds to increase the farm or pay for research. However, I do also feel uneasy whenever I see some kind of discount, not related to some holiday.
With cloud mining you should be carefull like all the time.
So many cloud mining companies have run away with investors' money.
None of the cloud mining companies have giving users to make a decent amount of profit either.