How so? The only way he would be entitled to anything is if he were a resident in the Netherlands, and he would have broken the law anyway by accessing a gambling site without a Dutch license.
This is not true. Non-citizens can sue in foreign countries, and especially in the Netherlands.
Yeah, that would be the ideal way. Just starting an international legal proceeding would cost him more than $2.7K.
There's no need for sarcasm. You are correct that filing a lawsuit would be impractical in the vast majority of cases, but if there are sufficient numbers of people who are missing funds - and to be fair there might not be in this case, because FBC has actually been paying out to numerous people, if not virtually everyone lately - a lawyer in the island or other jurisdiction might be interested in the case. In this case, judgments would be enforceable under international law. This is a hypothetical, however. In the case of FBC, the site appears to be cleaning its act a bit and actually behaving, although the site seems to have unresolved technical issues.