You want to know the difference between Reddit and Wikipedia? One of them is for-profit, and one of them is non-profit. Reddit acted like a benevolent entity so long as it worked to help them grow their user base. But they always knew that their user base was their product, and it was inevitable that they would try to monetize it. Wikipedia (and hopefully the lemmyverse) exist solely for their users, and which is why they have basically stuck around as one of the last truly public service websites