If they are using appropriated hardware, what possible reason could there be for them saying who they are?

Three different "companies" normally:

1. The residential proxies

2. Scrapers, on behalf of or as an agent of the data buyer

3. Data buyer (ai training)

Scrapers are buying from residential proxies, giving the data buyer a bit of a shield/deniability.

The scrapers don't want to get outright blocked if they can avoid it, otherwise they have nothing to sell.