[hermitdev]

My understanding is that for this type of gaming, e.g. gambling, there are regulations governing the randomness and repeatability of the randomness for computer/electronic run games. Part of it due to necessities of verification of sufficient randomness from the perspective of the gamer but also that of the gaming establishment. The game needs to be provably sufficiently random to the advertised odds for fairness to both the gamer and the gaming establishment.

For all intents and purposes, using a true source of randomness as the seed for something like a one-time use of Mersenne Twister as a pseudorandom number generator (PNG) is indistinguishable to an end user of true randomness. What it does do, though, is allow for reproducible testing to ensure you don't have an xkcd PNG [0].

Source: bar chat with a couple of friends & former coworkers who had spent time in that area of gaming (e.g. working on video poker machines destined for casinos), so take it with a grain of salt.

[0] https://xkcd.com/221/