You're right that you wouldn't want to use any non-cryptographic PRNG for gambling games of any significant stake. Many low-stakes games will use them, relying

You're right that you wouldn't want to use any non-cryptographic PRNG for gambling games of any significant stake. Many low-stakes games will use them, relying on having many different players connected to one result source to protect themselves. However, "624 consecutive outputs" is not the way to think about it, because those outputs are truncated to narrow integers. A single shuffled deck leaks about 230 bits of information, and backing out the state of a Mersenne twister needs several thousand bits of information.