The 25,002 Baht I spent 30 years ago on PR was clearly money well spent. No messing around with 90 day reporting, visiting immigration over and over, locking up 400K/800K and then worrying about whether I will get an extension or not. Some inconveniences though. At Chong Chom most IO's have never seen a PR book before and haven't a clue what to do. Phone call after phone call and they are none the wiser. Usually they stamp my passport and PR book as I instruct them.
Never did find out what the extra 2 baht was for. Well recall handing over the money in cash, and the lass behind the counter then picked it up and began to disappear into a back room.
HEY!!! COME BACK!!!! Please count the money in my presence. Done