At that time bitcoin was worth around 10,000/20,000$ and a FUN was equal to 50 satoshi (1 FUN = 50 sat).
Each Spin wheel has 4 prize categories, considering that the weighted average is of the common ones: satoshi, points, tickets, about 1/3 are tickets that in fact do not offer, except special cases of winning, earnings to the user. so 66% remains between satoshi and points.
Always at that time each common prize was equivalent to 50 satoshi/points/ticket, so let's say we got the prize of satoshi we had: 1 FUN = 50 sat, 1 spin = 50 sat, so a ratio of 1 (50:50).
Today we find ourselves with a bitcoin value 3/5 times higher and a FUN value 12 times lower, if we look at the spin wheels at the current value a common prize is 17/18 sat, while we have a FUN value of 4, so we get: 1 spin = 18 sat, 1 FUN = 4, whose ratio is 4.5 (18/4).
This means that the site must pay more than quadruple what it initially paid with the spins and obviously it may no longer be sustainable.
2/3 of the wheel prizes might be satoshis and points, but they changed the odds so that you win the 500 and 5000 prizes much less often. This effectively led to a more than 90% decrease in total cumulative rewards over time.
Initially, for every 1000 spins we would be expected to receive 50 sats*300 + 500 sats*20 + 5000 sats*13 + 50 rp*300 + 500 rp*20 + 5000 rp*13. This would be a combined total of 180,000 sats & rp.
Today, for every 1000 spins we are expected to receive 18 sats*330 + 180 sats*2 + 1800 sats*1 + 18 rp*330 + 180 rp*2 + 1800 rp*1. This is a combined total of 16,200 sats&rp.