Quote from kiwi_trader:
The organizations that are "anti-scalping" are generally NOT brokers. They are bucket shops ... that is they are organizations that take the other side of the trade from you.
Most of the options for trading forex are bucket shops.
The spreadbetters are bucket shops.
IB is a real broker and makes its money by you paying it a commission for every trade. More trades = more money. So IB are happy to just take your dollar.
Note: IB forex is not a bucket shop however they have some problems with sub-sized trades at the moment that can be a problem for newbies (so stick to currency futures for now). Apparently, in a month or so that problem should be fixed.