Used to be slashdot. Some people say it still is.

There was also DIGG. There were several large aggregators, but they all made changes that lead to mass exoduses to reddit. Back in the day there were sites like SomethingAwful, EBaumsWorld that served up memes and entertainment before we had purpose-built aggregation tools. Eventually reddit will make way for something else (and already has to some degree with its shedding of users to Lemmy).

i hope they allow porn again