@zandertrek yes, that is a plugin generated message.
If you go to the plugin settings, right below Global configuration there is a message (more than an option) that says how that number is calculated.
It is a formula: max votes per day is one tenth of the user reputation, with a minimum of 5 votes per day and a max of 50.
This is fixed, cannot be configured right now.
How would you like to override this setting? Would you like to set a fixed number of votes instead? Would you prefer to alter it to 20% or 50% of user's reputation?
The idea behind this being a formula was that the higher the user reputation the less likely that user would be to abuse the system. In other words, low reputation and high number of votes per day was the most risky combination that would allow spam accounts and multi-accounts to take advantage of the system.
But that of course is quite arbitrary. Why 5 votes minimum? Or 50 max? Why 10%?
So yeah, what would you like the plugin to behave?