I guess all the lawyers will say that too, the main developer or operator is the one who has the burden on all the cases because he is commissioning a campaign to pay people to promote.

Majority of the campaign here do not have affiliate code so they are not really earning from commissions only from posting and showing the banner from their signature campaign, maybe if they are actually leading people or recruiting people directly and they made money from recruiting like they do on Ponzi schemes like Bitconnect, then there's legal liability.