$20 is enough of a barrier to keep out new people. I was considering maybe trying it out until then.
I don't remember what I paid for RiF years ago, but it was a lot less than that. Heh, I looked it up. November 27th, 2013 I paid $1.99 for RiF. January 4th, 2014 I paid $0.99 for Sync for Reddit. I never used it, but apparently I had it.
$5-$8 seems much more reasonable. You'd probably even make more money through volume. $20 is prohibitive.
Edit: Oh God, it's $20 per year?!? Is that a joke?