B-D allows the universities who house the principal investigators who conduct government-sponsored research to commercialize their inventions.

This means, for example, that David Baker licenses Rosetta for free to academic and government, but commercial users have to obtain a paid commercial license. Baker (his lab, or LLC, or whomever vends Rosetta Commercial) benefits monetarialy from all the data that Rosetta includes, which is decades of structural biology funded by NIH and others.