I think this is an excellent idea and I've experienced similar frustrations coming upon amazing content that is 18 days old and really wanting to reward to writer, yet am not able to vote. It's really true that certain content only gains traction 8 months later....subjects have a timeline of their own. I'm going to tag @timcliff, @blueorgy and @kyle here since these are witnesses and maybe can add their thinking to this conversation and even help implement something like it.