Are the topics they're presenting "solved", or somehow not interesting? Do you think their presence pushed out more interesting topics?
I'm not sure I comprehend the immediate attack for, what appears to be, some neat research. Especially when that research is in the practical context of a game engine that requires good performance on extremely restricted compute.
I _dont_ have a problem with Roblox. FWIW I never used any of their product. I _dont_ have objection if HN discussed any of their papers published in SIGGRAPH specifically.
I _do_ have an ideological problem about a general blogpost announcing their corporate presence at conference <X> being promoted here on HN. If it was Google or Meta doing the same, my reaction would be 100% the same. Such low effort corporate advertising should not belong here. BTW, Google Meta MSFT all have such posts - and with good judgement (with the company of folks here), HN people don't post them