There's some stuff going on with Sia. See here;
The creator of SiaSetup has a number of concerns about the Sia and Skynet projects, expressed here.
siasetup.info
It might end up being nothing, but, it's good to know. And with Sia it's hard to be profitable with both offering storage and mining.
Personally, I just setup a storage blockchain with a similar name xD Chia. It's from the inventor of BitTorrent and was just released this year. Not many people know about it yet, so, I guess the potential gains there are higher.
www.chia.net