How The Websites Owners like Facebook,Yahoo,Google Make Money ?

[jack of all trades]

If we leave the part of advertisement,

How The Websites Owners like Facebook,Yahoo,Google Make Money??

Websites like Yahoo , google , facebook etc are free for the users and does not charge anything for there services, so how these websites make money ???
Mark Zuckerberg created Facebook and now have 500 million members.
Mark Zuckerberg became a billionaire by creating Facebook .
HOW???

...Please Elaborate...

:-)

[William]

It is all done by magic. Advertisers and algorithms make for $billions and the money comes from the people that buy stuff. Part of everything you buy goes towards the marketing and $1.00 from 500 million people twice a day is a lot of money. Just that is 1 Billion every ten days and we pay around a dollar a day towards marketing if we spend an average of $25,0000 a year or $70 a day. And there are 6,920,000,000 people in the world. and many pay for something every day. if the average is one dollar a week each that is seven Billion yes $7b week or $2555 billion a year for adverts. Google gets 95% of its income this way.