[enragedcacti]

> The second bit simply says "third party service" - nothing stops you from doing the combined chat overlay locally and streaming the result.

I think that is either legalese or poor wording in the text of the actual guideline, The FAQ has this to say about personal use of chat combining software:

> The prohibition on third party tools only applies to content presented to viewers either on or off Twitch.

"tools" and "applies to content presented to viewers" I think gives an idea of how they will actually enforce this versus the "service" wording of the guideline