What you can do to increase product quantity greatly depends on the type of site that you run. In this short article I’ll go through the two typical sites.

eCommerce

If you run a eCommerce site it is as simple as just adding new products, but if you run a different kind of business it becomes a bit harder.

Advertising Site

If you run an advertising site such as a directory you could add products that people could upgrade to such as as add free listings, featured listings etc. This typically has a far higher cost to implement than the eCommerce site, but in a lot of cases it would be worthwhile. You will have to do your due diligence on this before starting.

Affiliate Income Sources

Another way to increase your product quantity would be to add various affiliate products that suits your users. Affiliates products allow you to recommend third party products and receive commissions on the sales or leads. Instead of joining every single affiliate program out there there are several affiliate networks that makes it easier. You will just have to join the affiliate networks and you will have access to a lot of affiliate programs. There are many different networks that you can check out. I recommend joining the following: AzoogleAds, NeverblueAds and Commission Junction to start with.