Confused? That's SMS marketing services for you today... :)
Let's show you a little more in detail.
What they are doing is - whenever someone new joins them, they show their advertisers a new target to publish their ads. Remember these sites, like - mGinger.com, Sms2india etc, themselves are the ad-mediums only, not the actual advertisers. Whenever the advertisers use them to publish their ads for their targets, like you, they are paying these sites. In turn the site will pay you a commission of their earning, for helping them get more advertisers.
Let's face it - everybody has a cell phone. Consumers need information and they need it now. Taking advantage of the world-at-your-fingertips way of life means a lot more than just running ads on "Angry Birds" – it requires a deep understanding of your target audience and assessment of their needs for mobile content. That’s where these SMS marketing services come in.