Well, usually the winner hosted the contest and if the winner declined then we looked for replacement hosts.
Before bestmen, we had Slovakia, Denmark, Serbia, Ireland, Lithuania, Mexico, Brazil, USA, Great Britain, Tunisia host (hopefully, I did not forget anyone ???)
With Germany, Italy and Sweden having declined their hosting rights in the past.
There were never really huge problems with hosting rights and hosts were selected through OlympicIRLs mini-games when the winner declined hosting rights.
The only controversial hosting moment started from the time that bestmen aggressively campaigned to host the contest, verbally trashing every other host before him and he did it since fucking 2016.
Edit: if my memory serves me correctly, on one occasion we did vote? But then it was decided that it is not a fair system. Or perhaps that was proposed, but declined due to the forum wanting to avoid a popularity contest.