Do These Sites Really Work?

These sites are being run by individuals, maybe a handful of them. Do we know if they're storing all the information on a server in their basement or if it's stored in a professional web service provider? This is something that may be spelled out on their site and if it's not then I would strongly suggest that you ask before putting your material on there. A final word on this is that most of these sites have a cost although they sometimes have a free plan that can get you started.