True story. Accepted answer. 😂 There is written laws. There is unwritten laws. There made up laws on the go. And often nobody bothers about either of them.
The 4 to 1 rule is for the employer to worry about, not the employee. Also, this rule is enforced and checked by the relevant authorities each time a Thai company wants to hire another foreigner. For some industries (e.g. BOI companies) this rule is waived.
As I said. I don’t know their exact structures. But if Shelter has a Thai corporation and they employ people with their Thai corporation and Thai immigration issues Business visa and work permits for people working for that corporation … I would say that is as safe and as official as it can get in Thailand. Nothing is ever absolute here and we all know it.
With Shelter, the way I see it, you work, they pay you for that work and you pay Thai income taxes on that income from them. Can’t see any fraud in that. Pretty sure that social media lawyer had other things / the real scams in mind, like cases where people got business visa and work permits from companies they had no connection with whatsoever.