I can confirm Ghash is doing a double ltc reward. In other words, you make twice the money. No brainer to switch
it looks like scam
This is probably one of the rare cases where it's not a scam.
Ghash is just a very large organization that can afford to kickstart their pool this way.
Yes, large enough to go from 0%-25% of the network's hash rate within 12 hours because of this promotion. Two days ago they only had 70 MH/s.