What do the faucets check before sending satoshis?

[bloggersjoy]

Hello Everyone,

I have seen many faucets online giving few satoshis to their visitors every hour they visit. I am also thinking of running a faucet to boost the popularity of my site so I want to know how these faucets operate. What factors do they count before sending satoshis to their users? Do they check only the unique bitcoin address of the user? Please share your ideas and experiences.

Thank You

[Newar]

Making one or trying to trick one?

Some things I've seen: email, IP, other info they can read from your Browser/OS http://anonymouse.org/cgi-bin/anon-snoop.cgi

[Soros Shorts]

Use a technique based on browser fingerprinting: https://panopticlick.eff.org/index.php?action=log&js=yes