I like come-on #6, "Complete Security and Protection":
Upon receipt of your book, we send a certificate of registration to you right away, identifying you as the legitimate owner of your manuscript and including the date and time. In case of infringement, the individual at fault would have the difficult time to proving he had created the book before we received it and identified you as its author.
It's not a registered copyright. It's not a notarized document. It has the same standing any third party would have who sent you e-mail confirming the date and time they received your text. And unless the notice of receipt includes a complete copy of that text, all it establishes is that you sent them
something, with thus-and-such title, on thus-and-such date. It doesn't prove that it's a specific text.
Moreover, unless you signed off on an indemnity clause, or otherwise offered some species of guarantee that the text you sent was indeed your own work, they're in no position to identify you as its legitimate owner. All they know is that you sent it to them and you claim to own it.
It's a good thing their "certificate of registration" has no legal standing. Otherwise, they could get into trouble.
But that's not the only way we protect your work. We make daily backups of your manuscript and all submitted materials including graphics and photos. We keep two backup copies securely stored. In any emergency situation, such as fire, burglary, flood or a computer crash, you know you can recover your entire work at Pubboo anytime, day or night.
That is: they back up their own site. They're selling the fact that they back up their own site. Again, it's no improvement over storing a backup of your work at any third-party site, except that other backup sites are less likely to go out of business with little or no warning.