I hope this doesn't sound pretentious, but I really think Brilliant should diversify the rewards. There are so many amazing books out there, it just seems a shame not to take advantage of that. Plus, for people who don't have too much money, this is a great opportunity. Like the feynman lectures cost about a hundred GB pounds, and I, nor many others, have that kind of cash. To get is as a ebook, for say, 30-40k points would be swell. Also, can you perhaps re include the old system where you could post hints about how to do a problem i.e. what method, and only spend a few points to see then work it out for ourselves? Because now I don't know what exactly to study for said problem.