You’re not going to make a fortune overnight. These sites to make money writing online are for those who are in it for the long term, and are willing to build your portfolio over time. If you write for sites like Wizzley or HubPages, you will have experience with the marathon that is online writing.
One of the biggest downsides at the moment is how young the two sites are. While the posts are getting ranked, it takes time for them to really get noticed by Google. This is something that Wizzley noticed at first, but has quickly gained momentum. The sites will advance, but need more writers and writers who are willing to put the time and effort into them.
Like Wizzley, the two sites have a focus on high quality content. There is a three-article review process, so you’re not given self-publishing rights until you pass the quality standards with three articles. If you fail to meet standards afterwards, your self-publishing rights will be revoked.
There’s really not much else to be said about downsides. Bear in mind that these two sites are still relatively new, so it is hard to share downsides right now until I’ve tried out more posts and been there for the first potential payout (if I reach the minimum).