๐ฎโ๐จ๐ฎโ๐จ๐ฎโ๐จ sorry you had such a rubbish experience, this really sucks. Thank you so much for sharing everything though, super appreciated and Iโm sure many will find it helpful. Wishing you the best ๐๐ผ๐ฉท
It's very hit and miss - I've been asked several times for my outbound flight at passport control. Other times, they stamp you right in. I'd personally have an outbound flight booked within the required time frame, even if it's a cheap flight to somewhere nearby like Vietnam. Nothing is guaranteed - but I'd recommend to err on the side of caution.
there are services in which you can technically do it but when you leave and re-enter the country, esp. through Bangkok, passport control (obviously) don't like this and you'll likely face a lot of questions... better to go for DTV or ed visa