Absolutely,
I think that affiliate marketing (that is promoting other companies websites and they pay you commissions for sales achieved)
is by far the best way to make money on the internet.
infact I love this method so much i have produced a website which details other programs available at www.homebusinesszone.co.uk
and have recently added ei42 to my working list.

But it only works if you are willing to be dedicated and enable focussed activity to promote it.so that you get about 20-50 members siged-up under you.
Then the group grows by itself and with time can be very large this is when you see the commissions growing.

So it is not a get-rich scheme but it is possible to create a residuall (monthly) income from it.