As someone who has been posting product blurbs and connecting with fans through ENW for about 8 years now, my thought is that ENW is pretty awesome and I personally owe it quite a bit.
So I donated 5 of my books, my historical fantasy series (Clash of Arms: Cavalry, Clash of Kings: Nobility, Clash of History: Witch Trials, Clash of History: Guilds and Money, Clash of Arms: Infantry) to ENW for their subscriber program.
For those who don't know, you can support ENW for 3 bucks a month, and you get a ton of free PDFs to download when you sign up.
So now there's 5 more. If you were thinking about getting these books sometime, they would normally run you a whopping $6.25 to get all 5 books.