Ask HN: Thoughts on RSS Sponsorships as a marketing medium?

Hey HN, I run a pseudo-ad network that provides developers the opportunity to run sponsored posts/RSS sponsorships across some relatively large tech writer's sites. There are 11 sites in total, and we charge $2,750 per week, to sit right in that middle ground between a lower cost display ad network like Fusion Ads or Jim Dalrymple's feed sponsorship and the "premium" mediums like The Deck and Gruber's sponsorship. There are some weeks that we'll struggle to fill, and the other times we're sold out for 6 weeks at a time, although we've sold out every week for nearly 6 months since we launched. As developers and marketers of apps, what are your thoughts in general about this medium? How can it become more appealing? Is the price point interesting? Quick side note: I don't want this to come across as trying to promote my network, so I've purposely left the name out and any link to what we do.