Rubbish.Spreadbetting companies are not accountable to anybody (it is why they are banned in the US, but allowed to reign free in rip off Britain).
It's banned in the US because it's illegal to offer more than 2:1 leverage on stocks to retail clients. Nothing to do with betting, CFDs come under identical regulation. It's only recently that they've started regulating FX to any effective degree - the bucket shops which have closed down make the worst SB look like an angel.