We're not switching off the free plan. We're no longer offering an unlimited free plan. We offer 20 free credits a month. Most of our users do not send more than that, so they can continue using it without payment. But we do need to maintain and develop the service, and so for those who are able to, or who use the service a lot, we ask for a small payment ($2/month). More information in our blog post here: https://www.fivefilters.org/2020/push-to-kindle-changes/

As for alternatives, they do exist, and we encourage users to try them out. With services like ours, Kindle delivery is only one aspect of the service. The bigger and more challenging part is article extraction. That's where you're likely to notice the biggest difference in quality. Push to Kindle works better on many sites than competing services, but for other sites it might not do as well. So we do encourage users to experiment and see what works well for the sites that interest them.