Your first statement is unfortunately true, ZFS won't get much adoption in Linux if it's not in the kernel.
However, your second statement is blatantly false. Much of ZFS development happens in the open in the illumos and FreeBSD communities. Joyent and Nexenta base their business on ZFS and pay people to work on the open source illumos.
However, your second statement is blatantly false. Much of ZFS development happens in the open in the illumos and FreeBSD communities. Joyent and Nexenta base their business on ZFS and pay people to work on the open source illumos.
(Disclaimer, I used to work for Nexenta).