RPM/Socialblade require just 84 views per day on average, and they give you a 60% cut (I know because I've just signed an agreement with them). I'm in it for the banner and thumbnails, and I also believe partners appear higher in search results. It depends on what you want from the partnership, as you could wait for your channel to grow and get a more lucrative deal with Yeousch or Machinima, or you could use RPM as a stepping stone before moving on to a bigger network, if you wish to do so.
In my opinion, subscribers are irrelevant. It should be about the view count alone, as some people have a really poor subscriber to view ratio. I only have 21 subscribers at the moment, but I'm getting a fairly decent amount of views when you consider the number of subscribers I have. I'd like YouTube to hide the subscriber count, but that's another topic for another day. I know some of the bigger YouTubers also feel this way.