They aren’t. That being said it’s hard to go after an illegal company legally. Seems like 95%+ of pools are illegal. One of the largest pools just says it’s in “europe” 
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“once i was the king of Spain…”
Nobody has suffered financial losses. The profitability does not depend on the size of the pool. It always matches the calculator.
The farmers went in thinking there would be more blocks won, which did not match the size, and the pool cheated to get an unfair advantage against the pools that played fair.
If the profitability didnt depend on the size of the pool, why cheat?
Regardless of the number of blocks found, the income of the farmers is the same. This is the basic principle of mining pools.
The only reason to attract more people is to pay more often.