The bet almost hit 30 billion bets, i guess there will a giveaway to people who can bet 30,000,000,000 like Stake 2-3 days ago.
Big site, and big gamblers, it is a perfect combination.
The fact is the combination is a win-win situation, big sites tend to give secured, reliable gambling platforms, in security, and reliabilty to pay for winning bets, whilst big gamblers don't want to play on small, risky sites.
Because they don't want to lose money on small sites, that might turn into scam ones later.
I think that the level of betting on Primedice is impressive, I have seen some screenshots where they handle very large amounts of Bitcoin and some bets where they win dramatically, I think this is due to the level of trust that the platform lends, many investors and players rely fully on blockchain technology and on Primedice.