Wait, so you're just gonna keep this free service going? Or is this product going to turn out to be "hey our API is still free but only for N requests a month"?
Like, think if Embedly was used for some music recommendation application that pulled together results from Last.fm, Pandora, Grooveshark, and Mog. If I was a developer of an up and coming music playing/recommendation site, I would definitely pay some dough to get included in that group for the web application. It's a win-win, the developer of the mashup gets access to a greater variety of content, I, as the developer of the new music service site, get my website's name out there, and Embedly gets money in the process.