Why do you feel that way?
Github is way more hyped accross engineers but VMWare is 30 times bigger! VMWare is simply one league above Github.
Github is a Business Departement part of Microsoft. VMWare is a huge company.
This is the typical fallacy of B2C vs B2B. Consumer products are way more hyped and therefore people think they are way bigger than other less famous B2B Enterprise products
Most people with experience in this area would appreciate that one isn't better than the another. They are just different.
Plus, a VP at VMware isn't going to be in charge of that whole $9B like a COO is. Bitnami is going to be a "Business Departement" too.