How about a different type of funding model...Let's call it a "Refunder" -A LetsCrypt certificate is ultimately free BUT -You must pay X amount of dollars to

How about a different type of funding model...Let's call it a "Refunder" -A LetsCrypt certificate is ultimately free BUT -You must pay X amount of dollars to get one (a fair and low amount)\ -After 30 days, you can cancel/refund your payment -BUT you still get to keep your certificate... Probably in something like this, a fairly high percent of people will not bother to pay / are happy to continue to pay. LetsEncrypt certificates are still always free but at least this way human laziness means that LE important work can be sustainable into the future.