125 times the stake skips to 10 free spins
The buy charges 125 times the current stake and skips the base game. A stake of $0.20 costs $25. A stake of $1 costs $125. In the bets captured for the public audit, every buy showed 4 scatters and then 10 free spins. That opening grid is assembled by the operator. It pays the 3x scatter minimum and sits outside the provably fair chain. The 10 spins after it are inside the chain.
Paying 125x does not hand you 125x back. Most buys in a skewed game return less than the price. A few return much more. The long-run return of this buy was computed at 99.9997% of the price, from a 3x scatter pay plus a bonus expected value of 121.9996x, over the 125x cost. One purchase can still finish well under $25 on a $25 buy.
If you want the opening grid to be a reel result you can recompute, use a natural scatter instead. The natural path starts at 3 scatters and 8 spins, not at the canned 4 and 10.
Questions
What does a $1 stake cost to buy?
$125.
Is the first frame of a buy a real spin?
No. It is a canned grid, 4 scatters, outside the provably fair chain.
Does the buy return 125x?
Not as a typical result. The computed long-run return is 99.9997% of the price. A single buy can pay much less.