Originally posted on 05/07/2018:

People from poorer countries, who don't bet themselves usually, dealing with "rich gringos" throwing money away and being angry when anything stops them throwing it away faster.

Not that that is an excuse for rudeness, but it is the reality of the dynamic.

Plus, American expectations of how CS should operate, and treat customers, is unique in the world. Foreigners often can't relate to the way quite a few Americans act when dealing with CS. If you have ever told a CS agent how they should do their job or how they should speak to customers, then you are probably one of these people.