Whether ethical or not a lot of companies write it into their EULA or contract. It at least gives them some grounds to respond to a take down with hey it's in o

Whether ethical or not a lot of companies write it into their EULA or contract. It at least gives them some grounds to respond to a take down with hey it's in out contract. 10 to 1 no one is going to complain if the product is not of a questionable nature, they are just going to assume that someone somewhere in the org approved the use of the logo. Said product company usually relies on this and then takes down the logo should someone complain. With it written into a contract or EULA and with a policy of taking the logo down if a takedown notice is issues most companies have enough wiggle room to not end up in court over the practice.