How is it slimy for Academia.edu to operate under the assumption that its contributors retain the right to publish their own work on the site? Company X is doi

How is it slimy for Academia.edu to operate under the assumption that its contributors retain the right to publish their own work on the site? Company X is doing something bad. Company Y is started, in part, to circumvent the bad stuff about Company X. They wage a big PR campaign and take in millions in private funding despite knowing that they have no legal right to circumvent the bad stuff about Company X. Seems slimy to me, even though I agree Company X sucks.