It’s Google, probably just bought them on the off chance that they would ever do anything with them.

They are a company where the left hand doesn’t talk to the right hand very often anyway.

Two businesses can trademark the same name if they are operating in different industries. Or, the name could have spaces or punctuation that renders the same as a TLD.

Go Ogle Photographic & Paparazzi Inc. could have a reasonable claim to the same .google TLD. The registration fee is chump change for Google/Alphabet to make sure this can’t happen.