Heres how many flips you get with each Thumb: 1 Thumb: 2 coins 2 Thumbs: 4 coins 3 Thumbs: 8 coins 4 Thumbs: 16 coins 5 thumbs: 32 coins, etc Youre basically guaranteed to win each flip once you have three Thumbs on board (87.5% chance)
On the other hand, if the imprinted card leaves the exile zone while the activated ability is on the stack, the copy can't be made
Death of a Thousand Stings Or, as it was known in playtesting, Waste of a Good Name
Social Networking was close to Nonexistent back then I think this one area is the biggest reason why there might be less rule modifying now than the past: Back then, there wasn't much communication between the leagues across the cities, unless if there was a city-wide Pokemon TCG tournament that brought the individual leagues together
What's new this time around
For instance, in 2022, they released a Pride Month Secret Lair that championed diversity