I have been using WordPress.com Stats plugin on my site, along with other sites that I install and manage. Lately, I have noticed sluggish page loads and tried to find the source of it. The FireBug add-on to Firefox has facilities to show what loads and how fast. One of the scripts that loaded was one from quantserve.com and I knew I had removed the Quantcast script with which I experimented for a while.
Quantcast Spies via WordPress
By trial and error, turning the plugins off and on, I was able to trace the source to WordPress.com Stats. I could not find a reasonable answer by thinking about it, so I posted a forum question on WordPress.org about the matter. In several days no answer came from any source. Then I decided to do a more careful search on the WordPress forum and, sure enough, I found the answer. In a forum thread, Matt Mullenweg confirmed that they have been collaborating with Quantcast and some undisclosed features would be coming soon.
Openness and Transparency Became Opaque
This practice disappointed me. WordPress.org and its founder Matt have been the promoters of open-source code under the GPL and stood on the side of openness and transparency. The inclusion of the Quantcast script, which collects traffic information and accumulates it on Quantcast databases, with no disclosure to the users both surprised and disappointed me. What was even more disappointing was Matt’s nonchalant response “…turn off the stats plugin? :)” (His smiley.)
They Slow Down the Site
There is a noticeable slowdown despite Matt’s claim to the contrary, I validated this on several sites I manage and all showed visible performance increase without the WordPress.com Stats plugin. Needless to say, I disabled and deleted the plugin on this site as well as several others. There are quite a few other options that provide the same or even better data. Until WordPress.com and Matt come clean on this issue, I will not use this plugin nor will I recommend it to my clients.
Lesson Learned
My recommendation to you, the reader, if you use self-hosted WordPress you should test this on your site and then decide based on performance issues as well as ethical dimensions. I learned a lesson, even the most trustworthy appearing organizations and individuals may unexpectedly behave in unexpected ways. Caveat emptor!
Morten
Using Lightbeam for Firefox I discovered the same fact today: that my self-hosted WordPress blog with the Jetpack plug-in is serving Quantserve in the ever increasing data collection process. The plug-in is now gone and I’m now down to using the elements that I expected.
A. Cemal Ekin
Yes, JetPack also incorporates Quantcast data collection. My main objection originally was to the fact that they were doing it without letting users know about it. Since then, they came clean and openly admitted that JetPack includes ties to Quantcast. The utility of JetPack is quite rich and I decided to put up with the data collection. But, I fully sympathize with you.
One can also install WP DoNotTrack plugin and let it handle the Quantcast injection. I had that installed but it disappeared for a while. I have just learned that it is alive and well, and is now running on my site. (12/13/13)
Mike
Noticed quantcast tracking cookies while checking cookies served from one of my WordPress sites today. The Jetpack WordPress.com stats function loads the links to the tracking cookies from JS file – stats.wordpress.com/e-201327.js
The JetPack plugin does mention the use of Quantcast “to enhance the stats”. It’s just a bit strange that JetPack devs chose to load the script from WordPpress.com, instead of a local JavaScript like the other .js files JP uses. Maybe the idea is preventing the file getting modded to remove the Quantcast links.
I don’t see any difference in stats results when quantcast is disabled.
The DoNotTrack Plugin referred by A. Cemal Ekin still works with WordPress 3.8
As I only ever use JetPack for the convenience of the stats function – with everything else turned off, having tracking scripts is a high price to pay for this convenience.
While I’ll continue to use the stats function for now, in the new year will likely switch to a self-hosted Piwik installation to monitor my sites from a central point.