Note that it remains possible for Member A to set an obscure work, but - not at the beginning but as the five days draw to a close - it will henceforth be in his interest to provide hints. However at the same point in time it may be in the interest of a second Member, Member B, not to respond to those hints, hoping thus to ensure that Member A will lose a sizeable number of bonus points. On the other hand, a third Member, Member C, may not care about A's total, but only about his own, and might thus in defiance of B indeed respond to the hints, giving himself 180 and A the bonus!
Gosh, this is getting more and more exciting - tactical puzzle solving! Since my no 42 is the oldest unsolved, I should give no hints in order to minimise my plus score, though I've in reality given up all hope of catching RB in the Alan Davies competition.
PS what does a modified off-topic score?