Yes they do. "Buffs" in this context are the items that temporary boost your speed/stats/money/luck droprate etc. If it becomes visible as one of the icon in the upper right of your screen or replaces an older one, it counts as a buff.5000 buffs thou.. to get that, need at least few years.. unless u got a big reserve of various buffs and use one after another just for achievement.
I mean.. there is "usable" and "buff" .. so what is considered as "Buff" though.? Do these useless stuff below count for example?
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its not new.. bit old.. just never came out to public for some reason...