As long as a blackjack is run legally (like blackjack.fun is) the house edge is less than 1%, which is less than what the common house edge among casinos and dice games out there. Most of them have about 1% house edge and blackjack.fun has less than that. So yeah why would people prefer to play on any other place with higher house edge when they can simply play here with higher chance of getting lucky.
It's amazing to know the side effects of house edge on odds to win of gamblers.
I have not known it before.
From your words, with less percentage of house edge on Blackjack site, gamblers can have bigger probabilities to win on the new born gambling platform.