With 3, it complained that it didn't find the widget on my development site - which left me really confused.
A production-capable version would be extremely useful to our team, even with minimal feedback - we're in a public beta of a new version of our site, and we're using A/B tools which would allow us to get that sort of feedback from a number of our users without being overwhelmed.
We might only want to use it for 4 months, while a beta runs. A one-off payment of up to £100 (GBP) would be reasonably easy, if we chose to use it.
What's keeping it from production?