I click on these threads because I know there will be unfounded vitriol, and I enjoy shaking my head at how upset you people get. But you're still just not getting it.
There is a dearth of good running content available for interested viewers. We're in a pandemic where people want to watch more content about what they are interested in. There are only so many world championships and olympics finals available online. There are hardly any series documenting the training cycles of runners or giving viewers a behind-the-scenes look at how elite athletes train and function.
Formula 1 has traditionally been unpopular in the US. Then the "Drive to Survive" Netflix series came out giving viewers a behind-the-scenes look at how those teams train and function. There's been an uptake in viewership because of the Netflix series. Same with the English Premier League (soccer) with the Amazon Prime series following Man City, Tottenham, and Leeds. Liverpool and Leicester City have had some good videos made about their seasons too. Viewers want a behind-the-scenes look at how those teams train and function.
These Youtubers give new runners and bored-but-inquisitive fans a look into something that they haven't seen before. Their videos have large numbers of viewers; more viewers than actual running championships themselves. Nick Symmonds has 300K subscribers on YouTube. That's more subscribers than individual views on the YouTube video of the 2019 World Championship 800m final. More people watched Nick Symmonds run in a turtle costume on Venice Beach than watched him win a Silver Medal at Worlds. Zach Levet has 95k subscribers. Hoka's NAZ Elite Mini Meet during the pandemic has 2,500 viewers.
If you're a serious enough runner to know the differences between the elite sponsored teams, you also likely have enough experience to have your own preferences on shoes and apparel . Hoka's ad dollar is not going to influence you much. You might have your preferences already set.
But guess what? A new runner to the sport who enjoys Zach Levet or Nick Symmonds videos is likely going to be more influenced by their sponsorships. Hell, I didn't know Gymshark made running shorts, and, because of a Nick Symmonds video, I checked out their running line. They had a nice pair of neon shorts that I really enjoy wearing when it's dark out. His YouTube videos led me to purchase an item from one of his sponsors.
So, big picture, the running community should be happy that these runners are getting sponsorships. They are getting the sport of running into the collective consciousness of potential consumers, and they are providing content that nobody else is willing to put out there. Good for them!