This is simply a result of New Relic purchasing a large share-of-voice, 25%, of available inventory. 25% is currently the maximum we're allowing any single advertiser to purchase at one time on the sites outside of the trilogy.
Note: retargeting is not something we currently permit from paid advertisers.
I cannot reproduce this behaviour at this time. Of approximately 20 refreshes that I did, I got a very random distribution of ads. I also visited new relic via their ad which seemed to make their advertisement appear more often (1 in 2-3 reloads) but I cannot get it to reliably appear each time.
My colleague Anna's contribution to this answer: http://...
As Michael Horner points out in the comments these problems have been fixed in a more recent version of HTTPS everywhere.
My problem was that somehow I had turned off the auto updates of my Firefox extensions.
The solution is to Keep your system up to date!
The regular-expressions tag actually does exist, but something's wrong; I can't get to its synonym list (but I see the regex synonym in the master list), and your new question tried to create it, so apparently some parts of the system don't see it. I'm going to wait for a dev to look at this before I fix the synonym and merge them
I see the same diff output as you but what’s even odder is that I didn’t consciously modify the question body when I made that edit. However, from viewing the source (before and after), I can clearly see that all the Escape characters were removed by the edit.
It’s likely that I used the Tab key to pass through the body textarea as I navigated from the ...