Premium comes with a bunch of benefits:

Lightning Judge
Access to Premium Articles
Interview Simulations
Sort Questions by Prevalence
Premium Questions Every Week
Select Questions by Company

I understand that these would be worthwhile for someone in the heat of a job search.

However, for those of us just here as a hobby, we might not care about most of those benefits.

The only one I'm interested in is the additonal problems that are currently locked behind Premium. However, I'm not going to pay $35 a month to play with a few more sample problems; it's just not worth that much to me. There are other sites with free problems if it comes to that.

Have you considered an additonal subscription option, at a much lower price, and without most of the benefits of Premium, that only includes access to all questions? That might actually increase your revenue, if people like me go from paying you nothing to paying you modest amount.