This is useful when cutting cards by hand: even if your cut is slightly off, you won't see a white edge
The buyer pool for modern graded Pokmon is exactly the demographic on Misprint, the market data helps both parties agree on price, and the 7% platform fee (about 10% all-in with payment processing) is among the most competitive for a full-service marketplace
The proxy issued by a head judge would also only be in use during the tournament and would not be used further and thus not harm the market for the original cards
Second, Dark Salvation and Diregraf Colossus might not be good enough for the deck, at least in large numbers
Some rainbows are amazing in-hand
The actual effectiveness of this creature as a deterrent is debatable I want to believe its useful for a control deck without many huge threats of its own, but any semi-competent player can play around the Perplexing Chimera