I think most of us would find that difficult. I know I would (or at least did), because I've been there with my previous comic. The difference is that some people, like @marchen and myself, would be even more devastated by fake subscribers than by having only a few subscribers for a long time. I would rather be told that I look ugly than be told a sugary lie. Does that mean I WANT to be told I look ugly? No, it just means I really, really, really don't want to be lied to, even if the person has good intentions.
I'm not denying those people exist. But they're less than 1% of the entirety of the webcomic creator population.
If your main goal is to support less popular comics, wouldn't it be better to actively promote them by giving shout outs?
The way I see it, yes, less popular comics could really use more exposure, but I would rather give my two cents of exposure to comics that I genuinely love -- regardless of popularity. If I don't personally enjoy a comic, I'm not going to help them out. Why? Because if I help everyone, that would simply lead to subscriber inflation, and inflation never helps anyone.
That's my stance, and I respect your right to disagree. I really think you could have presented this argument without passing judgement on people who disagree with you on this, though. Calling it rotten is going too far. Subscribing is a site feature that different users use in different ways. Just because someone unsubs from a comic, doesn't mean they want that comic to die in obscurity. You have to respect that, the same way I have to respect just because someone remains subbed to my comic without actually enjoying it, doesn't mean they're trolling me.
Self promotion has become a requirement for the vast majority of us.