It doesn't help any one else unfortunately.
But I subscribed to Google Play Music All Access during the original promo in 2013. Part of $7.99 promo deal way back then, was that it was a Lifetime Subscription. Even after raising the price on all the 2014 YouTube Red promo users at the beginning of 2024, I'm still locked in at $7.99. I've de-Googled nearly everything else, but I'll hold on to that subscription till I die, or YouTube does.