No excuse, you can earn etheric light from IB and you can get to rank 5 price of piss and if you bank all your 200G item instead of cashing them in straight away you could easily buy 6 etheric light ... That's what I did the first IB then I realised this was just another day in the hamstwr wheel so I quit the wheel for an open world adventure. Also etheric light should be 50 marks and 3 strange coins each it still capped but you don't have to wait as long to buy them. Besides you could just cap the purchase limit to say 4 a week