May be we got it. May be that’s the root cause of our different opinions.

There is no “major” writing style on the big signs. The big signs are or contain the company logo which itself might contain letters in a special style. The logo is exactly defined by an image, legally protected and can be represented by an image only not by a character code like UTF-8. E.g. 7-Eleven has its name in the logo or “big sign”, Shell doesn’t.

In character coded text the companies adapt to the country. I mentioned already that the mall “Fairy Plaza” uses only the Thai and not the roman version in flyers. Even Mercedes-Benz does it on its Thai web pages. And I don’t think the company Mercedes-Benz is doing this because it’s aiming at less educated people who are not able to read roman letters.