Yes there was and I agreed with the court of public opinion at first and still disagree with some of the initial terminology it does seem as if Twitch is just attempting to align with YouTube on how it handles ads and sponsors.

YouTube and Twitch both want to make sure the viewer can tell the difference between and AD run by the site and a sponsored segment controlled by the creator. To help with this all YouTube sponsored segments must be the creators own words and not a standard commercial. Its why when its a “word from our sponsor” its an ad read by the creator instead of a commercial for a VPN product.