Do streamers get 100% of bits?

I'm curious to know, do streamers on platforms like Twitch really receive 100% of the bits donated to them by viewers? It's a common misconception that all donations go directly to the streamer, but I've heard rumors that there may be fees or deductions involved. Can you clarify how the process of receiving bits actually works and what percentage, if any, of the bits donated actually ends up in the streamer's pocket? It would be great to have a clear understanding of this before making any donations to my favorite streamers.