On the plus side of all this I hear a rumour that you may be getting 60 day visa free stamp as from Monday 14th…and extend that at immigration for a further 30 days each stamp…90-+ 90 = 180….plus x2 land crossing with 2 visa free entry stamps plus extension = 180 will be almost a year…..until someone clamps down on it
Land crossing x2 per year (1st jan to 31st dec) by air is until the immigration decides your living there on tourists visas…so it won’t be unlimited times….at a wild guess id say you’d probably get away with around 9 months stay until they stop you entering
If you have left Thailand you have been stamped out and your 60 day visa is now done,you re enter with a 30 day visa free stamp,your tm 30 also needs to be re done that cancelled when you left…if you want to stay past 30 days you can now go to io for 30 days extension