What more could we expect from them to do? They are a for-profit company. Opensourcing their entire interpreter stack with years of proprietary development is a bold move. It shows that they care about open source and want to give back to the community.

They could've kept these developments behind closed doors and nobody would mind it.

They also offered to provide support if anyone wanted to contact them. That is top-class behaviour from instagram, I personally couldn't expect more.