Last time my friend went to Cambodia they said he needs to go home because he has been in Thailand so long (years) and doing this Visa run every month. I also had this idea that it would be unlimited.
This what I was thinking too. Usually I go 3 times by airplane and never had broblems. I asked from Royal Thai Consulate and they said max is 2 times a year but I think they are thinking more like Visa run. Im more like thinking January, April, September and December. Cant be so hard that I will need to get 2 different Visas.