Guessing nothing, it's fact that International transfers do not take place outside of banks opening hours.
Why do you think the Wise exchange rates don't move over the weekend. Because the markets are closed.
I've just taken a screenshot of a Wise transaction as of 1300 today.
Why is the rate guaranteed for 26 hours?
Should arrive by date - 18th (tomorrow) Why?
As I said, that's your view but none of the world's experts agree with you and they see mass vaccination as the only solution.
You're obviously at liberty to disagree with them, but I don't think this thread is the place to do so.
I once did a u-turn at a set of lights in Chiang Mai and was immediately pulled over by a BiB who was hiding in the shadows on foot. A quick chat and then over the the passenger window and an exchange of hands and all is OK. The system in Thailand both encourages and allows such things, but as long as it does not go too far beyond that then there is no issue as far as I am concerned. Shake downs of businesses for 'protection money' and bribes to look the other way for a serious crime (Red Bull comes to mind) and things like Joe Ferrari are what happens when it goes too far. If that BiB got caught taking a few hundred Baht then by all means a wrist slap and let it go - but those other matters should be pursued and punished severely. They have to draw a line and that is how you do it. Right now that line is drawn way too high.
No, Pfizer is 3 to 4 weeks, and the expatvac site does NOT use "only Pfizer".
That's 100% wrong, wildly misleading, and totally untrue. The expatvac site is for "foreigners of any age group and any location within Thailand to register to receive their vaccination".
It only uses Pfizer for expats who are eligible by age or for medical reasons, plus others at their discretion - generally those over 40.
The suggestion that any foreigner, such as @gummy's kids at CMU, can register on expatvac and they will get Pfizer is WRONG - they won't.
I've tried to avoid avoided naming names for those here who are well intentioned but who give advice which is wildly inaccurate and has contributed to some on this site getting vaccines which are considerably less effective than they could have had, but that's what giving information which is wrong, such as yours, does.