I suggested moving some of FR’s features behind a subscription wall once. You would have thought I kicked a puppy. I got hit with some sob story about a lady donating the last of her money to FR as an example of why it won’t happen.
I've seen statements here that there are over 100,000 discrete visitors to FR.
If that's accurate, then a buck a month per visitor, $12 annual fee would raise $1.2 million instead of the $400 K budget that FR operates on today.
Make it $ 5 annual fee and you still have 20% more than today or maybe there aren't really that many eyeballs on FR.