None are going to be easy money- even the legit ones. Get rich quick schemes are a myth. Most writers, if they are lucky enough to make a living at it, will spend years building up their business before they get a steady stream of income. .
You have a few options:
Ad Rev-- which are like hub pages or even your own website with Adsense/affiliate marketing; you generally have more control over what you put out, but it takes time to build an audience. For people who are really good writers and marketers, who find a good niche and develop an audience, it has a lot of potential. Unfortunately a very small percentage of people can make that happen for them.
Ebooks-- same thing goes here. You can write one and put a small investment into publishing an E-book. However, the average sale is 50 copies. Again, unless you build an audience and market well, most people won't know your book exists and won't even be willing to shell out $1 for it with all the free online alternatives. But, for some people, their work takes off. It's rare but it happens.
Submissions to publishers-- you can go 'old school' and submit your work to major websites and online magazines. They usually pay pretty well, and within a couple of months of submitting. They pay a flat fee usually -- which can be anywhere from $5 to hundreds, and on the internet they usually seek all rights (so you will never again be able to use your article anywhere else). On the downside, competition is fierce and usually they prefer to work with seasoned professionals. It can also be very unsteady-- you are always looking for work, and (especially at first) will have to deal with a lot of rejections.
Private Clients-- with private clients, control varies. You have to write what they want, not what you like. They often want you to ghost write (no credit) and at a flat fee for all rights, which means if you write them an article or Ebook that goes viral and makes millions, you don't get a piece of that pie and you can't even put it on your resume. Good ones can be hard to find, especially since many think they can just pay $2 for an article.
If you can get a base of clients with ongoing needs, you can make hundreds, or thousands even, much like any hired contractor would in any business.
If you are not serious about writing as a business, your chances of earning anything are pretty low. If you do take it seriously, it will take time to develop your business, and you need to treat it like a business.