I thought the Mayans were about as extinct as the passenger pigeon.
Maya peoples living in the more remote areas of the Y. peninsula were spared the ravages of diseases like smallpox & typhus brought by the europeans (which did wipe out the Aztecs) because of their isolation.
I can report firsthand that some Maya, at least some of the ones with whom I acquainted in TX, do indeed still engage in sacrifices. But these days they're are more on the order of the 'saving their money and going without luxuries so their kids can go to college' kind. ;-)