Is it permissible to earn money from watching only non-prohibited advertisements for a company that relies on prohibited pyramid marketing, knowing that registration is free?

It is permissible to subscribe to e-marketing websites that allow the subscriber to earn money by viewing advertisements, provided that the subscription is free, and that the subscriber chooses which permissible advertisements to browse. However, if there is deception or fraud against the advertisers, or if the subscribers do not intend to interact with the advertisements, then this is not permissible in Islamic law. It is advisable to avoid such transactions as a precaution for one's religion, due to the Prophet's (peace be upon him) saying: "Leave that which makes you doubt for that which does not make you doubt."