It is one vote per IP address. When your IP address changes (like with a dynamic IP address) you get another vote 
Just change your browser. I use Firefox, Opera and Chrome: 3 votes in 5 seconds.
Besides, I have a second PC with 2 browsers: another 2 votes in 3 seconds
If you then use Tor browser or similar: a lot of votes in a short time
- good work guys -
Fantastic - we are at 161 upvotes for Datacoin. Everybody - we need 89 more upvotes to reach 250. Then we can engage the Next Exchange for them to do their due diligence.
-extro