I think it has mostly lowered the barrier to entry for Linux users already interested in ZFS, which is a good thing for user experience, but I haven't seen Canonical driving any feature dev and they aren't doing extensive backports or uplifts into their LTS distros to stay current with ZoL AFAIK. If they wanted to monetize it better, they could do a spin for the SOHO market that either helped replace proprietary filers the same way FreeNAS does, or highly integrate it into their private cloud stack.