The commentor did not do a good job of elaborating but I think it's actually not an unreasonable thing to wonder. If Netflix is trying to promote their documentary, getting Gates into the news as much as possible doesn't seem like an unreasonable strategy.
The Guinea Worm eradication campaign featured prominently in an episode of The Politician, a (fiction) series which was just released on Netflix. Coincidentally, I think.
They might be talking about the Bill Gates special.