500+50 makes sense for a new site, filling up with users who aspire to have a couple of thousand points in reputation. But over a year later, with many users having 10k+, and some having many times that, is 500+50 antiquated? Should the bounty ceiling be raised a bit?
Would my 500+50 bounty really draw the attention of somebody with 60-100k?
If a high-rep user loses interest in answering-for-rep (since the largest bounties are trivial), what incentive do they have to go into the featured tab any more? Does it become the case that your bounty-question will draw the attention of lower-rep users, with a few exceptions?