I'm not familiar with this research field but I would be concerned about what's the price tag came with that offer, and whether accepting that dataset is indeed

I'm not familiar with this research field but I would be concerned about what's the price tag came with that offer, and whether accepting that dataset is indeed in align with the research purpose, e.g. does it contain the relevant info, is it comprehensive, how could researchers prove that it's not manipulated / is the model used in production / is not biased towards FB's interest. I believe it is reasonable for FB to react to scraping under the current circumstances. But it seems equally reasonable for the researchers to go with the data collection approach they chose.