What's the deal with post stars?

Green? My ATS screen is grey and white or black and white. I get those options. Where are the color options other than shades of grey?

So you guys all tell me stars don't represent magical fairy syndrome?

I'm not sure what's up with the stars, but I do know if you type one sentence responses there is a punishment for that. I also have learned there is a hierarchy here, and if you challenge one of the SS officers here you will be admonished and told to read the terms and conditions that reads like the most boring book you have ever read. So far my ATS experience has been less than pleasurable. This will probably get deleted and I will probably get banned. Good luck OP!