How do i get paid to advertise websites on my website?
In generally you are not supposed to call these companies. In the very most cases it should be enough to check their websites and to look for affiliate link, sign up, FAQ etc. to find out how their products promotion works. Basically you get paid a percentage when someone buys something via your link – the point – you are helping the company to sell their products. Adsense pays you per click. A lot more info on this: http://fullprofit.netsalaries.
