Thanks for writing in! I agree that the shops aren't restocking enough items, I'm investigating today why 1 at a time seems to be the preference for items that should get 10-30 in stock. Will report back!
On 2 & 3 - these are some adjustments on purpose. The idea of these quests is to have far more of them (and now that we're nearing coming out of beta - I've got a few more tweaks!) with a broader range of prizes. E.g. some of them will provide LOTS of item rewards, and some will provide lots of sP (like Saggi) and it'll be up to you if you want to do all of them, or just a handful of them.
Handing out buckets of sP every day has made the site really hard to tune for, and I'm going to be trying to reduce that while adding things to spend that sP. What you're talking about is inflation, and even if we made it so that every quest gave 4 million sP as a base prize, within a few weeks that wouldn't be enough because all of the prices on the site would have risen to match the amount going out. Why would someone charge 10 million sP for something that now only takes a day to get the points for?
I'm going to keep dialing in Saggi in particular (there is a bug thread where I recently fixed a lot of his payout!) but the idea isn't that every quest will give you a ton of sP for turning in the items.
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