As with Abandon the Post, this only fits into very, very aggressive decks and will often be much worse than just playing another creature instead
Merrow Levitator Merrow Levitator asks for a lot of mana up front, but the potential of giving multiple creatures flying makes it stand out in a world of equipment and auras that boost only one creature
The second reason is that most reprints are quite inexpensive and underutilized, meaning that their effective and perceived value is significantly lower than $30 or $40 in most cases, and it mostly doesn't add up to the overall value of the bundles, even with Sol Ring
It's tempting to imagine ideal scenarios with them, but most of the time they just delay the inevitable and don't impact the board, and that's not worth a card
Wizards is extremely explicit that they are committed to stopping counterfeits, especially in organized play