They interact with a sizeable portion of those communities as they interact with everyone. I would be pissed if they came to me offline and asked for my consent

They interact with a sizeable portion of those communities as they interact with everyone. I would be pissed if they came to me offline and asked for my consent to fill in their data gaps on the presumption that I look too old/stupid to be one of their users capable of engaging online and accepting the ToS. I would also be pissed if they assumed some other group that fits existing prejudices of contractors was a better aproximation instead of by any form of normal sampling. It is simply a false dichotomy that their data samples are either white college kids or whoever they seek offline as the presumed opposite. It is more work to get a reasonable dataset instead of a bad one and one or two patches. I think they can afford that work using their normal portal in a way that isn't particularly controvesial aside from the public debates that should occur in general.