It looks like someone, probably RLM or similar, is running scripts from old TBR results to see what happened to the domains (For Sale and Where, Sold or In Use by a Company, 404/Not Resolving, etc.) for their own devious purposes.
I'm getting long sequences of Dan hits that correspond exactly to registration date, so it's pretty obvious what is going on.
It looks like someone, probably RLM or similar, is running scripts from old TBR results to see what happened to the domains (For Sale and Where, Sold or In Use by a Company, 404/Not Resolving, etc.) for their own devious purposes.