Even in 2006, the problem was the same and the solution seems roughly the same.
Reputation Defender rebranded a few times. I don't think they have this feature anymore. Might be worth asking them why they got rid of it, if that's what they did do.
Working there on the tool, I always felt like it was pointless because it's an unsolvable problem and scrubbing your info from a few hundred of the top data collection sites wouldn't SOLVE the problem... it just makes it a tiny bit less terrible but the effectiveness is not measurable. I think the TLDR is that people want solutions to things and programmatically unsubscribing only "works" in well lit neighborhoods and those too often aren't the causes of consumer pain.
Trying to solve the problem by deleting records is sort of like contract tracing coronavirus. Efforts to solve the problem by stomping it out wasn't viable and we now know we just need to learn to live with it in the endemic phase.