It could be that they are just trolling, since there is no source code, only website & social media stuff with a lot of unbacked claims.
The first claim they make:
"The Bitcoin Stash team is comprised of a group of former Bitcoin Cash developers and community members"
With no names or handles behind it it's most likely something like Clashic or "Bitcoin Core" the chain, just trolling.
No evidence to back that. I highly doubt this claim since the fork announcement is lacking critical information such as source code or details of the fork's fairness qualities.
Stash is a parody fork, if they do actually fork, it won't last long as it does not have enough support
Wake me up when an Exchange adds support for stash, so I have a place to dump them.
