I got my rights back from Month9 several months ago. BEST thing that ever happened to me. I re-published with a new title and cover, and in the first week, I made more than I made 10 months with Month9. Technically, one day of self-publishing made more for me than Month9 since I have yet to get anything fro-- ahem. That is another story.
What I'm saying is... you don't NEED a publisher to be successful. I think a lot of authors think they need a publisher name attached to their book to count as published. But royalties are MUCH bigger on your own (70% ebook). And I make tons with Kindle Unlimited. (2/3 of my earnings are from those free reads; I get paid per page read). Since I published on April 1st, I've made close to $5,000. And each month I will get a check because Amazon is good for their money.
AND I have ALL say in my title and my cover, or if I want to make a sale day. It is all MINE. No having my release date pushed back multiple times. I set the date. I set my own pace. And if I'm ambitious and want to publish 10 books in a year (not that I will), I CAN because it is on my time frame and I call the shots. There is no one else that is lined up in front of me. My publishing interests take center stage. And each book published adds to your income. Some of the self-publishers on the kindle form earn 5 figures a month.
There are expenses to self-publishing. Cover. Editing. Etc. But the freedom is so worth the expense. And I've made back my expense in a short amount of time. Not that EVERYONE does that, but it happened for me. Self-publishing is a good thing. It has a learning curve, but worth it. Oh, and I am able to publish overseas. Because I was with Month9, they held my rights and my ebooks weren't available overseas. I've done very well in other countries, especially Austrailia and Japan. It was a market I couldn't tap before because my rights weren't my own.
I've also got an audio book in production, with a narrator I got to choose on my own. Very fun process to choose my artist, choose my narrator. Best thing I've done.