Do we need a web site to make money online ?

Having your own web site is really valuable if you plan to work online long term and earning money online. But its not always a must. There are plenty of ways earn small amount of money by working without a web site. like by,

01. Paid forum posting
02. Blog posting ( Not your own blogs )
03. Bookmarks and directory submissions
04. Completing web Surveys
05. visiting web sites ( PTP sites )
06. Doing freelance work ( Freelance websites)