Do you have the latest build? If so, are you using a proxy that could be causing issues? Otherwise, just give it a restart then re-enable Fusion if you need to. I've fused many times!
Once they actually release it, I don't think that will really be an issue because everyone will be trying to use it. It's still in the testing phase right now.
Yes, CashFusion has been stuck at 12% tiers full for 11 days. I doubt they will ever fuse, which makes transaction-transaction privacy impractical or impossible for small amounts ~5USD
Anyone else adding liquidity would definitely help everyone else fuse faster. It's Beta right now so it can take a while sometimes but seemed to work fine for me after a little time.
It did for me too for a while, but now several months later i guess people have forgotten about it or simply not used it because i can hardly get a fuse in with less than $10 now.