I don't know whether it's good or bad necessarily. I like to diversify and have multiple sites I write for, mostly because there are different benefits to different sites. HP has a fantastic community and an easy to use platform. Though factoidz gets more page views and doesn't have a payout limit. So both have benefits, as well as down falls. As far as your work goes, if one site ever goes down for any reason, you'll still have something you can show off if you have other sites you've written for.