I wish Twitch would get rid of that single Tier 2 and 3 emote.
I mean if you get like 400 subs all of them have 15 emotes anyways, but if they decide to pay double they only get one extra, or 5 times as much for 2 extra.

I think they should go with first 7 milestones you get Tier 1 slots (for a total of 10) and then on the 8th and 9th milestone you get a Tier 2 and Tier 3 slot respectively, then the next 5-10 milestones you get Tier 1 slots again, etc.