Overwatch League on Twitch had the season watch pass stuff where you could pay for alternative angles, dedicated player pov etc. That didn't stick around for too long, and them them moving to YouTube after having been offered a contract there also tanked their viewer numbers even more.
So PPV isn't necessarily the answer if there is still free content available. Most tournament & broadcast orgs go hard on the offline experience for live events, which then benefits the online viewers, instead of crippling their content to encourage more people to show up in person or actually pay for a viewer pass to get a better experience. Twitch forcing ads down your throat mid round is just annoying and makes me turn off a stream instead of subscribing to the channel or god forbid buying Turbo, which does not benefit the broadcaster at all.