How much does Twitch cost?

You can't find anything on google so I don't think I'll get the correct answers here, but I can still ask:
How much does the Twitch streaming platform cost? I don't mean a subscription or twitch prime, but how much the platform costs or whether you can buy it at all

Do you want to buy the platform?
Amazon bought Twitch for about $ 970 million.

Which, by the way, can be found on Google.

Of course I don't want to buy it I was just interested xD

but thanks