Someone is gracious enough to release their code base, and choose to make a snide remark about their choice of hosting?
Because criticizing a no-strings-attached gift to the public is obviously rude? "Don't look a gift horse in the mouth" is not some subtle gotcha of social interaction. It's basic politeness.
If their choice of hosting is so terrible, you're entirely able to upload it wherever you please.
Sounds funny and like a direct translation from German: Einem geschenkten Gaul schaut man nicht ins Maul.
Is Dutch. German rhymes much better though!
Don't be that guy.