I don't think I would go as low as only once per day. I think that might not be enough to get people to do it.
I am currently working in the Foro Internacional Argentino. I'm requesting users to vote for the new site in order to promote its existence which at the moment is isolated as compared to this matrix. Please use this link:
https://www.bordeglobal.com/foruminv2/index.php?act=rateus
Click on all available vote for links - those that require a numeric value please rate. Thanks.
I try to go to the 'Rate Us' page every day, and I rate a lot of websites. I used to be able to see my bar move as I rated more, but it hasn't moved in several days. I had no problem moving my bar across the graph before, and I'm doing the same thing I was doing then.