Their are ads that are more than 30sec. So in return, the company pays more of members that view those ads.

ex: view 1 30 sec ads = $0.01
but
view 1 1 min ad = $0.02

It seems like pennies but it adds up to alot with the law of compounding.
(that is an accounting term for those that don't know )

See my videos and earnings proof