You can earn money writing for hubpages but you have to write good content that people will search for and the content needs to be in a niche that the ads are high paying.
Earning through hubpages can take up to 2 years to reach your first $100.00 through Adsense or other Affiliate network.
Be prepared to work for free for at least 2 years before you get a payment.
After the 2 years you might receive a monthly payment from Adsense because it takes time for your content to gain traffic through the search engines.
And you need to have a lot of hubs if you want to earn $500.00 or more per month through Hubpages.