I started doing quests again recently, and I noticed that some shops still use captcha codes but now some don't. Is there a reason for that? Or has it always been this way and I just never noticed before? I find it a bit weird that it's only used in some shops but not others. Does anyone know anything about this?

it was recently changed and is based on item rarity. lower rarity items do not require a captcha while the higher end does, the goal being to make it easier to buy from user shops while questing but still making the more rare items a bit more challenging to RS

Ah, okay that actually makes sense. Thanks for answering!

you are welcome (: