I'd use it.
If it weren't hosted.
And if it was Open Source.
Otherwise, I just can't bring myself to trust it.
The concept is a goldmine. You need to convince potential users of its security an privacy protection, should there be any. If there isn't any, your product is a ticking time bomb.
The concept is a goldmine. You need to convince potential users of its security an privacy protection, should there be any. If there isn't any, your product is a ticking time bomb.