There are already a handful of people mining altcoins with fpga´s, and they are getting insane hashrates. Only downside is that they don´t release their bitstreams to the public.
Why should they release their bitstreams to the public ? They become nothing for it ! They do receive something. A nice and beefy dev fee. Look at the total ETH hashpower for example, assume 80% of it is mined using Claymore's miner and take 2% thereof (his fee).
Do the math.
In case of monero / cryptonight, the algo was build by w0lf.
Claymore only use the algo from w0lf, and receive so much. w0lf only receice the bounty for this job.
Let me calculate
no bounty ... nothing for the bitstream-dev.