My buddy won about eighteen thousand from an offshore internet casino.
The money was distributed to him in small increments, e.g. three grand at a time, til he got it all.
No W2-G was issued to him.
He did not declare the winnings on his income tax return.
Question: would the casino have reported it otherwise to the IRS, and / or might his bank report the receipt of funds from the casino to the IRS, even though each amount was less than ten grand?
My guess...he can probably skate on it undetected, which would be a big advantage of gambling online IF you win big.