I believe it's probably because it's easier and a bit more exciting to go on the island tours.
That being said, I feel like it's not completely dead but there is more activity for trading/giving away villagers elsewhere and it definitely doesn't feel as active as it was for New Leaf on BTF.
That being said, I feel like it's not completely dead but there is more activity for trading/giving away villagers elsewhere and it definitely doesn't feel as active as it was for New Leaf on BTF.