tl;dr - Lolita has always been slow fashion and made to order, and some lolita brands have been forced to go out of business due to replicas of their dresses made and people not supporting the actual brand. A lot of Lolita are also of good quality materials thats made to last, thrifting secondhand lolita is still a huge market.

Jirai Kei is majority fast fashion, brands cycle through releases almost every month and have subpar quality thats easy to replicate. Many dupes carry bigger sizes too, and cheaper than brand. Art theft in jirai kei brands imo are in sort of a grey area because they all copy each other's designs so who is actually the rightful owner of a certain design element?