It also wouldn't hurt to put yourselves in the shoes of the etherpad owners who had to sell out. Maybe they wouldn't have if the fans had ponied up for the pro account.
I guess that is a general problem with the whole 'freemium' approach. I use a number of such products and services which I greatly enjoy, but see no reason to pay for because their free offering is more than enough for my limited needs.
Had they said pay us a few bucks or go without then perhaps I'd pay, but when they say pay us a bunch for a service you don't need just so that the service you do need remains free for everyone, it becomes a lot harder to whip out that credit card.