I am new to this site and I have a question which I am sorry if its too basic...
I knew a guy who started a very profitable business simply(or not that simply) by getting users to download certain programs he has developed and when installing them, if the user gives permission, it also installs a toolbar.
so my questions are:
1. what could be the business model in the scenario above? i.e how does this guy gets paid and by whom?
2. Is there an official term for this kind of marketing?
Thanks in advance for the help