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Small imperfections are acceptable, such as tiny white spots at the corners caused by the production cut or minor scratches that dont affect the color of the card
Its reprinted in the deck, but while were talking about cards that will recover, this will recover
If there were fewer, I could maybe maintain a deck for each, but as someone who might play cEDH, Old School, Premodern, Legacy, Modern, Pioneer, Standard, Pauper, and even Vintage, its just too much to keep a tournament ready deck for anything I might want to play
The incidental Scry you get doesnt hurt either Three mana for a stun counter and a +1/+1 counter all on its own would be a card that is pretty close to playable, and the fact this adds a counter to every tap effect definitely makes this intriguing
Tournaments can have prize pools of tens of thousands of dollars, and there is a thriving ecosystem of podcasts and blogs that discuss strategies and lore