You must not, and must not allow those acting on your behalf to:
...use the Data APIs to encourage or promote illegal activity or violation of third party rights (including using User Content to train a machine learning or AI model without the express permission of rightsholders in the applicable User Content);
In my eyes that is considered fair use, and I think the courts will come to agree unless they are financially incentivized to look the other way and thus create a moat for existing players at the expense of newcomers.
