Some hubpage writers earn $1,000.00 per month or more. But it took those people a long time to reach that point and a lot of writing without any pay in the beginning.
If you're just starting out writing for hubpages then don't expect to make any money at first. It takes awhile for your hubpages articles to rank in google at least 3 to 6 months before anyone will find your new content in google search.
And even then you might not earn much. You need a lot of content on hubpages to get a lot of traffic to your hubpages articles before you'll earn any meaningful money.