Two months ago you have had a big winner already, big win 15 million credit. Assuming that 1000 credit worth $1, means that the player won $15k but if 1000 credit worth $0.1 means that the winner won $1.5k.
No matter which denomination is the correct one, can you prove that this big winner does really exist? Sorry to say, but it sounds unbelieveable to see a huge win on a site with cheap script.