Vslice for example has done a few million dollars in betting volume in a year+, which with a 2% edge translates to probably less than $50 000 paid out to shareholders & they're valued at $30 million. The other $30-50 million valuations for EDG & FUN are speculative at this stage.
TrueFlip is already selling 3-5k tickets a day with a low jackpot, with the new million dollar+ jackpot & occasional advertising on coinmarketcap they could quickly get to 15-20k tickets a day. Which would translate into a few million dollars a year for shareholders.
So VSlice would have to get 50X bigger to match what TrueFlip could already do very quickly and EDG & FUN would also require hundreds of millions in volume to pay shareholders a similar amount because the house edge of other games is much smaller.
So TrueFlip could already be valued much higher than them and if they reach their roadmap target of making it much more decentralised and automated by early next year, it could do very well indeed.