Pinterest has been accused of using 500 million rows of user pins to train its AI, raising serious legal and privacy concerns. The company claims a license allows this data usage, but users argue the terms were unclear and not available in 2009.

Users are split between those who see the data collection as a clear violation of privacy and those who believe the data includes only 'limited personal information.' The user 'madeindex' pointed out that the term 'ROWS' is unfamiliar and estimated the data to be 2-3 billion user pins, assuming 1 ROW equals 4-6 pins. Others argue that the lack of a clear license and the absence of user consent make the practice legally questionable.

The community consensus is that Pinterest's data usage is legally dubious and lacks transparency. While some users acknowledge the data might contain limited personal information, the majority believes the company has overstepped ethical and legal boundaries, with the fault lines clearly drawn between privacy advocates and those who defend the practice as necessary for AI development.