scorecardresearch is the endpoint for comScore which is used to do exactly what you mentioned. Imgur buys the data from comScore as a sort of "online Nielsen rating" in order to sell the value of the site to ad vendors.
If imgur has to buy profiling data from someone else, it isn't really their data is it? That is, imgur could not recreate that same data alone, they need the partner who can get the missing data from the rest of the partner's network.
The bottom line is imgur's data is probably not worth much, what _is_ worth a lot is imgurs traffic, and that traffic is taking a hit from adblock.
The bottom line is imgur's data is probably not worth much, what _is_ worth a lot is imgurs traffic, and that traffic is taking a hit from adblock.