Never made any financial contributions, I assume OP means, completely missing the mark about Marx being anticapitalist. Ignoring the obvious: We still talk about Karl Marx, even make unprompted green text about him, proving a social contribution
His books and writings are a contribution anyway. Plus he was already wealthy so idk if mooching off his family is accurate at all.

We still talk about Karl Marx, even make unprompted greentexts about him, proving a social contribution

Furthermore, you actually have the time to do something other than slave away to the bourgeoisie. Sure, you might not have a lot of it in your own experience, but child labour and 16 hour days were completely normal before Marx.

Marx had the idea the surplus value the capitalists are actually profiting off of is the commodity of the worker’s putting in time. I mean, he didn’t really consider it a commodity, just pointed out how capitalism commodifies human labour.

But yeah pretty much all trade unions and socialist parties owe their existence to Marx.

“Didn’t make any contributions” such ragebait