Wowio.com - a pleasant diversion, executed badly

Wowio.com is an interesting attempt at providing free e-books.

It has two cool features:

• content providers get paid (reportedly around $.50 per download)
• high-quality PDFs of books and comics are available for free

This is more than balanced by the downsides:

• the selection of materials is laughably small, making the "users who downloaded this also downloaded" feature nigh-worthless
• the selection of materials is limited to textbooks, a few classics, horrible independent comics, and webcomics
• the download feature is throttled to three downloads per day.
• main site background is black.
• Limited to US, non-free email addresses.
• There is no content-uploader, so I can't join in the fun.
• There is no user-interactivity. I can't write reviews, can't link to other things, there are no forums, there's no wiki. In short, I am a passive consumer of their site, and must leave. Where's the stickiness? How are they going to create passionate users?
  

I've been downloading for 4 days now, and am reasonably satisfied that I will have seen everything interesting available in their collection in about another week.