The solution is right there in the article and in front of (fuck) /u/spez...make it a part of Reddit Premium. I was on Reddit almost every single day for a decade and not only did I never even think about subbing, most of the time I forgot it even existed. The ridiculously low number of subscribers is Reddit's fault entirely. They could have killed two birds with one stone by saying "members will get an ad-free experience in our app and can try these other apps as well". Win for Reddit (actually gaining subs for their Premium service), for the apps (they stay working), and the users (more options).
But I guess just destroying everything you spent your life building is a tempting option as well.