I arrived from the Netherlands Oktober 23 (Dutch and Australian nationality). Leaving this Thursday, 58 days, so visa-exempt.
At the airport at passport check, they didn't even ask when I was planning to leave... no copy of my return ticket. Not even where I was going to stay... Just visa pages check, facial recognition and digital fingerprints.
I was here also in January/February 30 days, and in March again 12 days... (Australia in between).