It doesn't matter whether they have hexproof
BUT if that character or card gets readied by another card effect they can be exerted again
This is key because while you can also use full control, its very obvious if you start doing it at a given period if you havent throughout the game, signaling that you are, in fact, using full control and likely your opponents will infer you don't have anything
Resourceful Defense An often overlooked staple of counters decks, Resourceful Defense lets you move counters at will between permanents
I suppose the idea is you have a full grip of creature cards that you can use to juice up your amplify creatures as you play them, but heres the problem: almost all the amplify cards are really expensive, with the cheapest of them being three mana
Strategy This deck is all about utilizing creatures until your opponents get rid of them for good via exile