Estonian registered aircraft, Lithuanian or Russian pilots. English a second or third language. The agent in Kefallonia lost his rag with them because he couldn't communicate with them. Meanwhile British holidaymakers sit fat, dumb and happy in the back thinking what a bargain they have got.
Would you put your life on the line for a tenner? It seems some people will, although I guess they are doing it through ignorance and not by choice.
A bit harsh don't you think? Surely flying with Aeroflot or Turkish etc (who's first language also isn't English) is no different to the example you give? Understanding what is being said can be difficult for many who work in the industry. Doesn't New York ATC sometimes have problems being understood due to their strong accents?
I do agree however that in a business sense the operation might not be very stable but there is nothing in the public domain (atleast what I have heard) to suggest they are an unsafe operation.