Hi. I don’t know about similar websites, but I can imagine that people click on a link when they are on your website. So, my feeling is that the bounce rate should be low, at least below 20%.
There are a couple of things I am thinking about.
Have you tried to get the plugin out of the cdn folder and just have it in the www….? I have never tested the plugin this way and it also shouldn’t matter, because the plugin shows on your site, but just too rule it out.
Do you advertise for your website with Adwords or another way and you get an audience that was never interested in your site? I have seen this with campaigns; people just go to the landing page and are out again. Pages per visit go down and the bounce rate up.
On days where your have the bounce rate spikes do you get also spikes in visits from one IP or city/area or one user agent? I have one website where the bounce rate used to be below 10%. This month more than 45% are Russians going for the login page and the bounce rate with them is 100%. My bounce rate went up to an average of 69%… Thanks to Russia.
Other than this I am a bit stuck. The plugin works for many and I don’t understand why it shouldn’t work for your website.