This is an interesting take on knowledge gathering and how best to use the latter. Traditionally, the approach has been either to use search(i.e. Google or Algolia) or the use of collections(so many on PH e.g. Startup Stash with their 18K upvotes). UseFYI is an ingenious hybrid: it uses both. The genius of this Marketing Resources List is that is naturally promotes the underlying service by showing what can be done with it and how powerful it is. So, great product in and of itself and brownie points for the innovative promotion!
This is the most comprehensive collection of marketing resources I've ever seen.
Been a beta user for several weeks. It's great.
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UPDATE: Turns out they've already addressed one of my "cons" (lack of tags)!