This is due to the way their effects are worded: they tell the player to search their library for a basic land type, like a forest or mountain, then put it into play
Kinnan, Bonder Prodigy does pass the test, but this card does not need help in the ramp department
That list contains a number of cards which are not legal to play
Taking turns off to play table cop can be a huge tempo loss
Ill let that one marinate for now, but suffice to say, though I think the Gift mechanic overall is well balanced and offers room for fun when it comes to Commander politics, I am wary of seeing more of this mechanic on Made-for-Commander cards or just ones that will outmode other options in the Commander card pool
Are we sure this is the right genre, though