>>30717714Basically, doujinshi activities are done for profit. Those who make doujinshis because they like the content are in the minority. It should be noted that unlike online shopping, Comiket is a gray event where taxation can be avoided because there is no evidence of sales or revenue. In other words, it is a place where you can earn revenue without paying taxes, except for corporate participation. Due to the official collaboration with dlsite, a well-known doujin sales site, Niji-sanji is no longer allowed to exhibit r18 works at dlsite.
Basically, r18 is the main genre of doujinshi sold by vtubers, and all-ages doujinshi are not in great demand.
Since most of the products exhibited at Comiket are basically sold at other doujinshi sales sites, it makes sense to avoid Nijisanji.
However, this does not equal popularity, but only demand for erotica, which is the case with Hololive. In the past, many products were limited to the venue and enthusiastic fans actively participated in the event, but recently there are fewer products limited to the venue and more are sold on the Internet. Unlike in the past, it is not such an important event.