IMO, the benefits aren't from getting mass adoption of this fork, but actually the opposite, at least ostensibly, because if it were to become "the" systemd, it would then face scrutiny and potential legal threat. This way, the maintainers can be in compliance, the legislators (who if there are any paying attention) can be superficially satisfied, while people can still avoid the antipattern. It's the "brown paper bag" speech from the Wire, basically

At some point people will realize that not having an optional data field might not be worth the effort of indefinitely rebasing a revert and recompiling, since they could just not set the field for their user account by doing nothing