Depression, maybe financial woes, family troubles, etc.. Be it can't be blackballed when you have your own studio, can drop a album or single on iTunes/Amazon just like a major would do, go on a small tour, start up an entire new crew, etc. The music industry isn't the same as it was 8-12 years ago. Alot of these guys wish it was still about major labels with pull, big budgets, $100,000 dollar videos, your new album in Tower and Warehouse Records, big arena tours, etc. This new internet era has alot of people confused, mixed up, and not knowing what to do. Some of these artists are like guys who wish they were back in high school cause life was so much easier for them