NYSE has a similar standard. The problem is that NWBO has negative equity on its balance sheet, so it pigeon holes them into just one or two alternatives.
From NYSE:
* Currently traded companies qualifying solely under the Market Value Standard must meet the $75 million Market Value of Listed Securities and the $4 bid price requirement for 90 consecutive trading days before applying.
That is the AMEX, not the NYSE (NYSE bought the company, but still 2 separate exchanges).
True that $3 (the min bid on the AMEX they would need) is easier to hit than $4. But that is still a far reach w/o positive TLD or a R/S.
I do not know what the AMEX rules are ion governance issues. The NYSE is stricter than NASDAQ (that NWBO failed, and then repeated would have failed over the next few years). LP might not like having to allow dirty shareholders to votes on certain issues.
All this is still the old pump that keeps being brought up. Bruce was consulting since 2016.