They often are. But it's not something that's fundamentally built into the platform like it is on Facebook. YouTube receives no benefit from it so they certainl

They often are. But it's not something that's fundamentally built into the platform like it is on Facebook. YouTube receives no benefit from it so they certainly don't promote it, and the audience discourages it too because they feel like they're watching dishonest content. So yes, it happens, but it's outside the control of YouTube. Facebook fully embraces it. They've built their entire platform around it.