First off, thanks a bunch for developing this module. Well done!
We installed this a few weeks ago and it's been very helpful. However, we've noticed over the past couple of weeks that the URL hosted on the VWO site (dev.visualwebsiteoptimizer.com/j.php) becomes unresponsive at certain times, where it slows down the page significantly and/or times out. This even occurs when using the async version. Because we have site monitoring in place, I've been getting text message alerts at 3am over the past week, all due to the VWO URL being unresponsive.
I checked the VWO website and apparently they have a "self-hosting" option to host the javascript files locally rather than rely on their servers. I was wondering if you would consider adding this feature in a future release?
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Going to close this off as WAD. If self hosting of the JS was an option via VWO then this would be something to look at, however he workings are to always load the tests from VWO's servers as that is where they would be configured and loaded from. With Async loading, it also shouldn't slow the site down any more than loading everything else.