Youtube + Clickbank ???

I'm new to Clickbank

I hit up a few of my friends with popular youtube channels
All their views are organic, none were bought (at least thats what they said)
They weren't making much money off the usual Adsense/partnership networks

So I told them if they talked a bit about a Clickbank product (like fitness) at the start of a video, and put the link in their description, they could make great money

Do you think this will be profitable or no?