The laptop new launch promotion of Sony Ericsson. They sent the ad through e-mail and called users to forward it.
In the ad, Sony Ericsson used the element of “benefit to users “to motivate the forwarding rate. And they provide two different models of laptop to make the people who want to get a free laptop more actively and widely send the e-mail to their friends. At last, this ad could like a virus be transmitted to many people's mailbox. Even if the people who received it but no forwarded may also be aware that Sony Ericsson have launched T18 & R320.
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