The cash requirement was never removed and has been around since the 90s/early 2000s (it used to be 10k). In reality, it's the most commonly used criteria to deny entry.
In the future, you can apply for the reentry permit anytime. Some people buy one at immigration when they get their yearly extension, the reentry permit is good for the length of your extension.
As for you, you'll need to start the processes over again, apply for a 90 day Non-O at immigration.