They deserve to be called astronauts, even if that dilutes the brand.
The definition of astronaut is anyone who travels into space. Space is defined as as certain altitude above the earth.
Ah. So you are one of those spacey-space-tourists who paid a couple of million USD to brag with "I'm an astronaut" to get laid and now you cry because you are being taken away your brag rights. My sympathies.
People who go to conferences are the ones who shouldn't.