HitLeap is an automatised system for pushing some traffic to your website. It is useful for Alexa ranking and it does not require manual interactions. This makes it less human-intensive and somehow attractive.
Here is link to the service:
HitLeap is still a traffic exchange service so first you have to earn minutes, that you can spend to put your link into the public awareness for a certain number of hits. Once you’ve gained that traffic, you’ve spent your minutes, and you must accrue more in order to earn more traffic
In other words it hooks up people who want to promote their sites with other people who also want to promote their sites. The idea is a mutual exchange of viewers; you show me yours I’ll show you mine, in a website sense.