At place made up of primarily self-published writers, there's a much bigger range of self-publishing experience and incomes, and you do see a lot more people succeeding at it.
Thanks to two boards I frequent that are primarily self-published writers, I know
several people making between $5 and $35k a month (at least one or two handfuls of folks make more than that), and have watched many go from making $0 - $50 a month to those levels. It's how
I make a living now. There are also a number of people making between $1,500 and $5,000 a month. The low-end of that isn't living wage territory for most people, but it's a nice boost in income for most people.
There's no one here reporting those kind of numbers, I don't think, but there are only a handful of people actively posting their sales here--very small sample.
I'm not saying there aren't heaps and scads of people who are lucky to sell 2 copies a month to extended family--oh man, there are. But I think it's important to remember many people who are now making a nice extra income or a full-time living started out selling just a few copies a month. And the existence of all the truly awful stuff that's barely literate and should never have been put up for public consumption should not taint the fact that people can and do succeed, in the same way that all the horrible submissions that get glanced at and rejected do not taint the fact that many people get accepted for publication. No one ever looks down their nose at someone's new agent or publishing contract based on all the horrible submissions that must have gone before, but it
feels like most people look at all the horrible self-published stuff out there and look down their noses at the stuff that does well, just because they got there by the same process. Man, I find that strange.
I don't think the self-publishing landscape is as bleak as most people here at AW do, and that's based on what I've seen among people I know.
The odds of failure or success at self-publishing aren't the same for everyone, just as they aren't if you're trying to trade-publish. Most people who try will fail at both, I believe, or at least not reach whatever goals they've set for themselves. But just like someone asking the odds of success in submitting a novel, those odds shift if you can spell, use correct grammar, tell a story, submit it in the preferred format, follow the rules. Most submissions are easily dismissed, but for the ones that do most things right, the odds of getting picked up are much higher than the average odds among all submissions.
It's no different with self-publishing. If you have a competently-written manuscript that tells a good story and you package and publish it well, your odds of selling better than the average self-published book go way, way up.
There are no guarantees either way, and of course self-publishing isn't for everyone. But it's not nearly as bleak as most people seem to think, especially for those who
seriously work at it.