Many people are too pessimistic. Sure if this was a new company I would be a lot more worried. Sure GAW is not being transparent with zenpool but they have a great track record. A lot of the competitors are now following (look at BITMAIN) so it means this new idea is pretty good and is making profits for the hosting company. It does not mean this is a scam. ROI is a different story though
You're right, but this isn't a good thread to post positive feedback, most of this discussion is troling or troll feeding. I could quote several good opinions that were called shilling, while some obvious troll posts were quoted.