Praise be to Allah.
It is permissible to make money from surfing websites, advertising them, attracting customers and designing ads for them, so long as what the websites publish is permissible and does not promote anything that is haraam, and the payment in return is a known amount.
This payment comes under the heading of commission.
It is essential to avoid haraam tricks such as creating false accounts to give the impression that these are customers who came through you, and taking commission for bringing them, or using software to do that, because this comes under the heading of deceit, deception and consuming wealth by unlawful means.
It is not permissible to produce ads for evil and unlawful activities or products, or to help in promoting such things, because Allah, may He be exalted, says (interpretation of the meaning):
“And cooperate in righteousness and piety, but do not cooperate in sin and aggression. And fear Allah ; indeed, Allah is severe in penalty”
And the Prophet (blessings and peace of Allah be upon him) said: “Whoever calls people to right guidance will have a reward like that of those who follow him, without it detracting from their reward in the slightest. And whoever calls people to misguidance will have a burden of sin like that of those who follow him, without it detracting from their burden of sin in the slightest.” Narrated by Muslim in his Saheeh (4831).
With regard to giving people’s emails and phone numbers to the websites, it is essential to have their consent, because of what results from that of annoyance and the possibility of their data being misused in a manner that adversely affects them.
There is nothing wrong with this network marketing, so long as there is no obligation to buy a product or to pay fees, no matter what name is given to them.
And Allah knows best.