Can confirm that land border around Bangkok are not stamp 90days. Kanchanaburi said NO, Ban Laem sometimes OK first first timer, sometimes not OK, so better make a good planning and fly OUT/IN or get a Tourist Visa.
As you see on enclosed picture, even a guy with first entry on 31 December was given the Number 1. it is calendar year, so if he decides to do another border run in January he will be marked Number 1 again. Some Officers marked
****
or
******
, others just mark 1 or 2. However the limit for border crossing coming in on visa exempt is TWO per calendar year for one person.
I did not get an confirmation from the Thai-Myanmar border at Kanchanaburi. The Thai-Cambodian side will most likely stamp Israeli passport, but might ask extra money.
Bus trips to Cambodia and or Myanmar our company can do, but I need to check with Immigration if OUT/IN is OK, but it appears that he is offline. Myanmar in Kanchanaburi we just did one South African today, no problem