I come to the "Answers" section when I'm looking for something to do anyway, but when I saw this question I couldn't resist answering it and pointing out that this is a particularly time for me to answer because (at least until it changes, which I imagine will happen within hours of now), I'm at 100.
For the most part (and most the time), my score tends to range between 95 and 99. It sometimes hits 100, less often in recent months than in the past, but I imagine that's because I've been less active on here, except for within the last week or so). In recent months I've also seen it dip to 94 a couple of times, and I hadn't seen that in ages. I think, though, what happened was I may have been at 95/96 and then made the score go down by being too active with the "community stuff". I have slow periods with the kind of work I do, so sometimes I'll kill a lot of time, looking for stuff to do on this site (but not being in the mood to write a Hub). So if I do too much activity on here I'm not trying to do anything "funny" or questionable by putting my name all over every community activity there is to do. I'm just bored. BUT, I think it's built in that they want to reduce the chances of one person's appearing to "monopolize" the site by having his/her name show up too often in too many places. Then again, the score tends to drop with too little community activity - hence a lot of the ups and downs of scores.
Either way, that one Hubber score doesn't matter a whole lot as long it's in "the respectable" range, and that's a pretty big range. As so many other people can/do, I can vouch for the fact that the score doesn't particularly reflect higher traffic. My traffic right now is about as low as its ever been on here. The same with earnings.
I mostly posted here for new people wondering about the kind of involvement/effort it takes to get a 100 score. I'm just one, isolated, example among "zillions" who've seen that score. They're all different, and most will say what I have about how little it matters, or how little difference there is between 100 and, say, 95 (or, for all I know, 77). A lot of people have just been conditioned by grade school to like seeing "100". (I'm as "guilty" as the next one at that liking-100 thing). HP staff, itself, will tell you not to pay a lot of attention to the score. I learned ages ago not to because - really - the ups and downs could drive a person nuts. (lol) (What's bad about 100 is that there's no place to go but down, so a nice, healthy, 96 is kind of good. )