The amount isn't the same for everyone. If your balance is equal to or greater than 2x of your total free play winnings, you do not need to solve a captcha.
Ahh, that's why it came back, you changed it from playing hi/lo game. Looks like I'm stuck with capture then as I've been playing for so long.
Also, wagering in the HI-LO game helps. I had to increase the balance requirements to 2x from 1x previously because botters had figured it out and could reach no-captcha without depositing. Now they will need to deposit to roll without captcha so it has reduced their activity.
No worries Wetsuit, I understand why you have to do it. I did enjoy my little period without captcha but as I've been with the site from the beginning when BTC price was much lower I've obviously accumulated a large total free roll winnings.