It's not the fact it costs $4 MILLION for 30 seconds, "Shark Tank" star Kevin O'Leary tells TMZ Sports there's another big problem when it comes to Super Bowl advertising.
Mr. Wonderful hit up Craig's in L.A. for dinner Monday -- when he explained why spending the money could be a great investment for the right company ... just not for him.
But the real challenge when it comes to Super Bowl advertising isn't coming up with the cash ... Kev says it's all about what happens AFTER the big game.
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