End of the post it says 51k so far. I'd expect the price to go up a LOT more, because otherwise the sane (monetary) advice becomes "report some vulnerabilities to apple, and then keep finding them and sell them to third parties".
Also, they state in the article: "However, it appears that Apple does payments in batches and will likely pay for more of the issues in the following months."
Zerodium - http://zerodium.com/ Azimuth Security - https://www.azimuthsecurity.com/ NSO Group - https://www.nsogroup.com/ ZDI - https://www.zerodayinitiative.com/ SSD - https://ssd-disclosure.com/