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You tighten up. Why? Because the money you lose during these kill pots is much tougher to recoup when the limit goes back to normal.
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That has nothing to do with EV. If you are adequately bankrolled, you should take advantage of these opportunities. KJo is a clear winner against players who will play and cold-call raises with any face card.
Many players correctly muck KJo UTG, so the
PokerRoom statistics don't tell you how much it is worth when you play it. However, almost all players limp or raise with KQo UTG. Does this "easily dominated" hand do better in a tight game, or a loose game?
KQo UTG
Loose: $1-$2 +0.10 BB/hand
Tight: $10-$20 -0.12 BB/hand
The difference of
0.22 BB/hand is huge. KQo UTG does much better in loose games, even though this leads to multi-way pots where the conventional wisdom is that offsuit Broadway cards are weaker.
By the way, though the data is tainted for the reason mentioned above, KJo UTG also does better at $1-$2 (-0.01 BB/hand) than at $10-$20 (-0.19 BB/hand). That -.01 BB/hand suggests that an above average post-flop player should play KJo UTG in $1-$2 at PokerRoom.
KJo is easily dominated, but when your opponents are playing garbage, there is a much greater chance that you dominate them than that you are dominated.