This has been coming for quite a long time. The time for excuses is over. If you think the safety of your users is "simply not worth it", well, I'd like to know what your websites are so I can block them at my firewall. I'm not saying this to be a dick, I'm saying this because this is an attitude of callous disregard on display, and it's downright odious given the modern security climate.
LE is not that hard to use, and I seriously question whether you can't make an API call once every 90 days per subdomain. The requirements have never been lower.