Thanks for the reply. I was asking to understand when I can return. But this only confirms what I think: I knew that by land or sea you can only enter 3 times a year, but if they then tell me that by air there are no limits it's a lie...

I mean, it's all approximate at the discretion of the officer and if they send me home to passport control they will only create problems for me.

There is nothing written in black and white, it's all at our own risk. If I go to Thailand 2 times a year without extending the visa I'm just a tourist, but maybe the goal is to make people pay for visas,

...if at least they were clear, they play with the 3 card trick.

It's not correct.