At first it was claimed that Fury Pro won't be any good, hence, only two AIBs (ASUS & Sapphire) have SKUs. Reviews done and dusted, the vast majority are positive.
Now its only 2 AIBs have SKUs due to lack of yields. On a cut-down part. Lack of yields on a cut down part.
It would make more sense if they speculate that HBM yields are rubbish and is limiting the entire chain of supply so we don't get good volume of SKUs using it.
While we're on this trend of speculative random stuff, let's throw this one to the mix.
According the usual rumor click bait:
http://wccftech.com/amd-working-entire-range-hbm-gpus-follow-fiji-fury-lineup/
They are suggesting that AMD is going to play very dirty with HBM2. They will leverage their close relationship with SK Hynix to get first dibs on HBM2 chips, all of it, before NV is allowed to get their hands on them. This means they will have first to market next-gen Artic Islands + HBM2 GPUs.