How to generate website revenue

Hmm.. yeah it seems like there doesn't to be much other forms of generating revenue other than what I suspected--ads or e-commerce. Plus you can't benefit from e-commerce sites unless you were the entrepreneur who was vending the products to begin with. Obviously we're not the entrepreneur because we are all in fact freelancers....

So is that it? Just adverts? Adsense just takes the brunt of all revenue, with the odd paypal membership fee if needs be?

There must be some other creative way of bringing in more revenue that we haven't discussed.