You've heard right.
There are plenty of ways to make money with Hubpages.
2.Adsense , Ebay , Amazon.
About the first one, you can read an join the program from here:
About Adsense , Ebay , Amazon and Kontera.
Those are third-party programs which by taking part in them and presenting them in your hub can make you money.
Adsense , for instance , shows textual advertisements in your hubs , so anytime someone clicks on one of those ads you make money. (Please notice that you can earn money with Adsense just by getting impressions to your hub).
Amazon & Ebay will pay you by showing products for purchase in your hub ,and if I am not mistaken you earn a commission when it happens.