A very good way to get an additional source of income without having to spend any money is to register at PTC sites. What are PTC sites? PTC stands for Pay-To-Click, where you earn a certain amount of money just by clicking on their ads.

PTC sites have recently gotten very popular on the internet and a lot of new such sites are popping up almost everyday. One can have many different methods of earning through PTC sites, which are:

1. Most PTC sites offer special packages where you can buy referrals and build your downline. People who sign up by themselves without any referrer becomes part of your downline when you buy such packages.

2. Almost every site offers a premium upgrade for members, where you get to view ads that may be specifically targeted at premium-only members, or that you get more money from each click if you're a premium member. For example, a free member may only get $0.01 off an add, but as a premium member you may be able to get $0.02 or more.

3. In some sites, such as Clickasia, you get money from signing up at certain sites too! Some of these sites are free, while some are not.

But BEWARE! As more and more PTC sites are emerging, there is one thing which all of us must be wary of, which is that most of these sites are actually not honest and may end up scamming your money. How to tell which sites are scam, and which sites aren't? It's quite easy though with the power of the internet.

The best way to start with PTC sites safely is to start out as a free member, and then use your earnings to buy referrals and packages. As such, even if the site scams you, you would have ended up losing nothing at all! Although this is the most 100% safe proof method, it may take quite a while for you accumulate the amount of money required, as each ad only provides you with a measly $0.01.

The next better way of course, is to do a search off google to find out whether the PTC site you are signing up under is reputable, whether they have a lot of complaints about late payments, whether there are payment proofs by normal members on their forums, etc, before you decide to invest in them.

2 very such sites I have joined currently is quite reputable and have a lot of positive comments on their forums and other sites. They are Clixsense and Clickasia! Just run a google check on both of them and you will find a lot of positive comments and payment proofs on them!

So, if you haven't signed up for them, what are you waiting for? Do it now by clicking on the 2 banners below, you have nothing absolutely to lose!