It makes a lot of sense. Both the git repos that they hosted and things like a RSS feed-reader are things that are the prime target for AI scrapers and the same time quite database query heavy on the backend so that the scraping really has a big impact on the costs of running these services.
And yes source-code is among what is the most targeted data to ingest by AI scrapers, mainly to train coding assistants but apparently it also helps LLMs to understand logic better.