At a bare minimum, training and releasing a model like this builds critical skills in their engineering workforce that can't really be done any other way for now. It also requires compilation of a training dataset, which is not only another critical human skill, but also potentially a secret sauce if it turns out to give your model specific behaviors or skills.
A big one is that it shows investors, partners, and future recruits that you are both willing and capable to work on frontier technology. Hard to put a price on this, but it is important.
For the rest of us, it turns out you can use this bestiary of public models, mixing pieces of models with their own secret sauce together to create something superior than any of them [1].