It's a good idea for the people with GPU miners to share or leak them. Block rewards are small, and the FUD is hurting the price and any profits you make with a GPU miner.
Wow...just...WOW! After reading this, I really wouldn't blame any GPU dev for trying to gouge out as much money in private sales as possible.
Axiom Devs had the opportunity to pay at least one GPU dev a fair price for a public GPU miner and they declined, now they are openly asking those that did pay for a GPU miner (or spent time coding it themselves) to leak it to the public!?
If the Axiom team wants a GPU miner they should put some BTC up for one to be open sourced and public.