what currencies are offered there?
USD, EUR, GBP, and possibly canadian bucks and south african rands, the off chance of swedish kroner.
the email states that if you don't use that currency in your country, you are afoul of the terms. so only america, the EU, and britain are allowed to play, and perhaps a scant few other countries lucky enough to have their currency available. that cuts almost four entire continents (s. america, africa, asia, australia/oceania) from being allowed to play, plus the non-EU places in europe, as well as mexico and central america. racists!
but if you're a super-duper-nit, argue that banks in your nation transact using all types of currency, so there are in effect people "using" that currency in your nation.
any way you slice it, it's poop! if anything, playing in pounds is likely to give you the least amount of actual chips for your money, and thus a greater chance of losing it back to the casino. if, instead of buying 100 pounds, you bought in under ZARs, you would have maybe 1000 or more to play with, and more ability to vary your bet size etc. with pounds, you really limit yourself, and the casino punishing you for using a currency that actually helps them win is shitty for them to do.
the only way it could hurt them is if the numerical max bet is absolute, and you are betting the max, say 500, in pounds compared to 500 of another currency. but still, you are putting your own money at risk each time you play, no matter what denomination/currency the chips are classed under. they should be slapped. not only should it not matter, if they want it that way, it's easy to fix/stop people from doing, as has been said, yet they choose not to.
fvck those thieving bastards!