I highly doubt QR bans their crew from going out entirely because of some crew members providing another form of service. By all means it is a reasonable excuse which would make sense in some people's ears, but the main reason is probably to keep crew from having too much fun as in partying and not coming home until late.
And, for AAB personally sacking crew on inauguration flights. It doesn't only happen there! He personally sacks crew in DOH, or wherever else he would be. Place doesn't really matter! I did a couple of inauguration flights and I remember after one a small meeting which included the entire crew and him! Not the nicest words came out of his mouth!
I still strongly feel for all of those who have no other choice but to be there! Life is not always fair!