How are people getting multiple Bachelor's and Master's while utilizing TA?

They're using their GI Bill or paying out of pocket. Also, at one time there were exceptions that allowed a certain number of credits in excess of your degree if you were pursuing prerequisites for a higher degree. I don't know if that's still a thing as the TA rules have progressively gotten more restrictive over the years.

Sorry for typos, I'd obv meant to say this, not his, about Excelsior, clumsy tablet, I'm afraid....

http://www.excelsior.edu

His was part of NYS govt, it privatized, they have a second-degree rule, or did, I know, I used it for a second bachelors in !ath, a friend got his bachelor's IH mat while they were still part of NYS govt, I did the second bachelors while they were also, though after I'd gotten out. He went Navy OCS using it, while I'd been in USAF after OTS...it can also ne done for a second associates, they also have an !A in liberal studies that can ne done for a STEM topic, I'm fairly sure, math, if nothing else, I dont know if the second degree rule still applies. When I did it, I used up some grad credits I had toward undergrad usage with them, higher can always ne used for lower...also, they, along with I think OAK Tree College in CT, as well as Edison State Univ in NJ, also allowed, or still allow, a block of pass/fail credits for the GRE subject tests, theyvy been rather curtained of late, though they still exist...Excelsior gave 30 credits for a minimum raw score, 15 assocs level, 15 bachelors level, with Oak Tree, I think it was 24, Edison, I dont know about...he GRE subject tests aren't cakewalks, I know, I did engineering, math, and physics...the fengineering one is gone, I think, as is comp sci (CS) and biochem/molecular bio, though math and bio still exist, I think physics still might, I had to take physics three times to pass it, so, I'm telling you, they're not for the faint of heart, however, if you want to do a second assocs or bachelors, that's generally the only way I know of, OK?