Currently, you get one per day. However that will become a thing of the past once we switch over very soon.

Your DVS has been collecting a reserve for voting for a couple days now. When we switch over (coming soon), Your 1st post you make will take a portion of your reserve and turn it into an upvote. you will have a larger portion remaining that will continue to build up. If you post again, your next post will take the same percentage from your reserve, but since your reserve is now lower, this upvote will also be lower. Following me?