Similar effects that "tap and freeze" a creature don't exert that creature
Very quickly, this two-mana equipment will spiral out of control, both in equipment-based decks and just regular creature-heavy decks
Its a little bit clunky to be sure, but Wargate is one of the most flexible tutors in the entire game
It doesn't copy whether that permanent is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, and so on
The term "ramp" in Magic: The Gathering refers to any spell card that generates a net positive amount of mana, whether that be through floating mana that expires at the end of the phase, lands placed onto your side of the field (though some count searching up lands to put into your hand as ramp as well), or artifacts and cards that create artifacts that can tap for mana
A black-bordered Nicol Bolas from Legends might be worth $20, but thats only due to the rarity of the set