Actually, back when WoR and BoD were the common 35/55/85 boost constants, I remember a few neofriends that would pretty much only BD and play Neoquest to the point where they could finish it in a day and a half consistently.
But now-a-days with SoA under 1m (was 1.5m when this was going on), SoRF under 500k, and BoD/WoR being driven down by more competitive weapons, I can't see it being as lucrative anymore.
If you think about it - it's the ONLY worthwhile game to play (in terms of those long ones)
What other game would give you rewards?
NQI? Plushie Tycoon? Pyramids? Etc...
It's definitely not a great way to make money - but it's cool. You get some nice trophies (I dare say that out of those games - the NQI and NQII trophies are the hardest to get excluding Plushie Tycoon) and a decent weapon at the end. You'll probably get some half decent ones as you're going through normal - evil.
I kind of like the game, I've played it a few times and I try not to play all the levels consecutively or I find that I get burned out. Both the Wand of Reality and the Bow of Destiny going at 2.5-3 mill is pretty consistent. They're cheap items to get (whether or not you did NQII) for their stats.
Plus if you think about it, other then AB-ing and SS-ing - what else do you have to do on neopets?
I like to play NQII and meerca chase haha. Chia Bombers sometimes, but there's not much to be done after you get all the cheating down.