Reddit appending the parameter, rdt, to the url. Is that a part of their profiling and tracking efforts against adblockers?

As stated in the title I recently noticed Reddit appending the parameter, **rdt**, to the url such that you would get the following:

reddit.com -> reddit.com/?rdt=12345

Is that a part of their profiling and tracking efforts against adblockers, particularly for anonymous users? An internet search brought me to Reddit's website on Ads Pixel Retargeting and there I found a brief mention of **rdt**.

https://reddit.my.site.com/helpcenter/s/article/Reddit-Ads-Pixel-Retargeting

I find it difficult to believe that this is just an issue with SSL and is …

adblockers parameter privacy profiling reddit tracking url