Yeah, he would never open up about that.
There are two basic ways to get paid by a music venue or bar with a stage: a flat rate negotiated ahead of time or a percentage of the ticket sales once production costs are covered. A lesser used (anymore) third option could also be a cut of the bar sales. With an international somewhat name act like Blaze, I'd be willing to bet he gets some sort of small flat rate + a portion of the ticket sales (let's say 70-80% after production costs are taken out). But like any touring act he probably makes his best money on selling merchandise.
No doubt he plays smaller, more suburban venues in order to get a flat rate that will at least cover his travel costs. I.E. he recently played Bolingbrook, IL (a suburb 45 minutes away from Chicago) instead of playing Chicago because they probably gave him a better deal.