So, it is AI, I gather also MS and ET, right, who are joining *A ?

Does not this bring the alliance a bit into disrepute ? Sorry but I had pretty bad experiences with both MS and ET (e.g. flights that don't exist, no explanation given). I never tried AI/IC but I am not sure I would...

I think alliances have to be kept exclusive, or am I wrong ?

True, ST has AZ and SU, so maybe they are all opening up to whoever comes...