An error occurred while saving the commentgladeare commented
I made my account in 2013 and since the start of bits I have never been able to view ads for bits. always "try again later". I have tried this every hour of the day, so it shouldn't be the global daily limit.
My guess is that twitch calculates how likely it is that granting the user "free bits" will make them spend money on the site. And since I haven't paid for anything on twitch for 6 years they might be pretty certain that I won't do so in the future.
I personally just really dislike the silence on the side of twitch.