chottom
I Love YTtalk
All these people saying it's "cold" and "harsh".
Why would they want to spend large amounts of time recording, editing, etc. with someone small who will not benefit their channel, when instead they could collaborate with someone who could expand their own channel, thus making the several hours, if not days, producing the video worth their while.
If you had something like 2,000 subscribers, you aren't going to spend time recording with someone who has 10 subscribers unless it's because the are your really friend or they have AMAZING content (even then, probably not).
Collaborating and giving shout outs to a bunch of really small channels makes a "good name" in the community and earns you a small army of highly dedicated small youtubers ready to spent all their time promoting their "big subs number" benefactor throughout the net.

It is all about strategy - I think Niccolò Machiavelli had a good book on the subject.
