Putting the generic term into your corporation's name can be effective means of claiming things that don't belong to you.
Jon Postel reserved 44.0.0.0/8 for a generic purpose: "amateur radio digital communications." Decades later, there was a successful heist when some enterprising individuals who had incorporated "Amateur Radio Digital Communications" misrepresented to ARIN that the assignment had actually been theirs. Immediately after ARIN gave them transfer rights, they pocketed 8 figures reselling the space to Amazon.
Github obviously isn't making explicit claims like this but they benefit whenever people with purchasing power implicitly understand that github is the only option.
edited: Amateur Radio Digital Communications is not an LLC
This lengthy email thread[0] indicates that Jon Postel made the assignment in 1992, that the entity "Amateur Radio Digital Communications" wasn't formed until years later, meaning Jon's assignment had to have been for a purpose and not to an entity of the same name.
The head of ARIN defends[1] the transfer throughout the thread.
From your earlier comment it sounded like there was a "heist" simply based on having a similar name. Looking into it though, it seems like the ARDC non-profit did a pretty reasonable job of proving they were the same folks who'd been managing the IP block for decades. Also, has there been any sort of allegation that they've misused the funds? From what I understand they've pretty consistently used the funds to support amateur radio.
That assumption has come up in almost every conversation I’ve ever had with semi-technical people regarding git, so the confusion is just a fact. It happens so often, I think Linus (or whoever controlled the git trademarks at the time) should have demanded GitHub change their name when it was launched.