If they use the data you provide (such as your address) to search other data brokers, doesn't that potentially give the data broker MORE information than they already had on you? Do the companies in this space prevent this somehow?
Edit: Lest people think this is somehow impossible otherwise - all it should take would be to search for just your name + location, get the query results, then filter on the client side. Which is exactly what a human would do for the brokers that have a "remove this entry" option when you see (presumably) yourself in the search results. However, this not only requires the data brokers to support such an API, but also requires the deletion services to actually put in the effort to do it this way for every broker they can, which seems nontrivial. Hence my question of whether these services make such an attempt at all.