Likely stopped after i started adding abilities. When this credit that is slowly creeping up flips over, I'll buy a diamond and start over and watch it.
I probably hit whatever amount equals the credit overflow too quickly. If I had to guess, it's somewhere after 100Qd/s. The credit rate is slowly increasing as I level but arena $ doesn't count for much, a few % at this point. I probably got 4-5% before hitting the $/s overflow.
Initially, I got a couple hundred credit, flipped those, then worked up to 2500, 5000 and finally 10000 diamonds. I flipped it as soon as I could, so it was a fresh credit after the rebirth.
You can see I gained a little since the screenshot earlier.
