To answer your first point, you could argue that but the reality for Twitch is that they may not possess the bandwidth to build it themselves.
That's not to say that they aren't smart enough, or don't have the money, or don't possess some sort of hard skill or item that would let them do it. It's the nature of successful companies to focus on their core competencies and Twitch may consider it not worth the risk of distracting themselves. If it picks up traction, they will go to Revlo and look to invest/obtain warrants in the business. If it's even more successful, they'll try to acquire it and then they'll have the solution without all the risk.
This dynamic is played out in a lot of industries and is hardly a reason to not pursue this idea.
That's not to say that they aren't smart enough, or don't have the money, or don't possess some sort of hard skill or item that would let them do it. It's the nature of successful companies to focus on their core competencies and Twitch may consider it not worth the risk of distracting themselves. If it picks up traction, they will go to Revlo and look to invest/obtain warrants in the business. If it's even more successful, they'll try to acquire it and then they'll have the solution without all the risk.
This dynamic is played out in a lot of industries and is hardly a reason to not pursue this idea.