At 105 weekly limit is 40+7x4k per login check in so 68k in total. But I agree, limit on sun and moon scrolls actually feels punshing, since there's not much to redeem in strange stone shop.
I asked about this one upon a time, and got reply that there's no plans of increasing scroll limits. Too bad. This would be a good way to get more players to be more active. Most of the active players are maxed too soon and therefore play less in end of the week.
I'd take even better rate for Strange stones. Currently we seem to get 1 for 100 sun/moon scrolls. That makes a single Mood scroll cost about 7K sun/moon scrolls. When thinking what you could get from their Grosery rooms at that cost...