I was lucky enough never have to deal with them, but how does this actually work? Does the guard at the booth call a supervisor who then takes a final decision?
They granted us Visa exemptions without mentioning how many days we can spend there as tourists. I usually do 4 months a year (easier now with the 60 day stamps) and it seems to work, but some people get trouble at the border even after a second visit because some random guard does not believe they are “genuine tourists” as it you could measure such a thing.