I still think give 1000 Doge or 500 USDT as prizes and no bet back restrictions can be done more often which will attract more people than giving the 1 BTC once every 2 or 3 years.
1000 doge prize every day is around 62,000 usd in a year 500 usdt a month is around 6,000 usd a year.
about 68,000 usd in giveaways for the year.
no strings attached to the prizes.
a btc is about 107,000 so they could give the smaller prizes for 550 days before it is a btc.
and who knows how much 1 btc will be worth by then.
right now it's $107k, but the price could double, triple, or even quadruple. (the moon is the limit really)
if someone does win the 1 btc in a year or so, it's going to cost them a lot more compared to when they added this.