Any company professing their workers can work remotely from anywhere in the world is committing fraud and aiding in the tax evasion. If a worker is working remotely in another country, the company is responsible for paying his taxes in the host country. For twenty years I have worked remotely in some of the world's top companies like Google, Facebook, Microsoft, Oracle, Qualcomm, and AMD,, and all have clauses that I can only work remotely in US territories only.
Technically, one must be physically present in the country where they applied for the eVisa. Of course one can cheat the system, but it will be immigration fraud, and if caught, the penalty can be up to 5 years of imprisonment and up to a fine of 10,000 baht. Each time you enter, you get 180 days to stay. The visa is valid for five years from the day it was issued (not when you entered Thailand).
looks like anonymous has not visited any country except Thailand. Hence, he is confused about exit stamps just like Tom the brick layer, Dick the carpenter and Harry the truck driver.