Facebook gives you better returns as well as Google Ads, Linkedin was not a good convertion rate at all and they don't really care about it so yes you're correc

Facebook gives you better returns as well as Google Ads, Linkedin was not a good convertion rate at all and they don't really care about it so yes you're correct about the statement of "Money Pit" it's because we're used to Facebook and Google conversions that we expect the same from Linkedin and actually it's different platforms with different goals and objectives, not sure why you should expect the same "money's worth" on every platform out there each one has a different objetive and different users that's how it works they're different.