nostr:npub1qq7hl5sl6z0l0ahk8f6a4uv5mkvlama7dyvucdmtwdva2zg24xnqyafedr the only thing that comes to mind is people scraping them with grabbers, since they're on the nose when it comes to anime imageboards
nostr:npub1xanjytp3clslynd2hxlnxg32jzz9wafxj9g4x6k28sjgljasd8wq3qjlvy I get that they want to lower load on their database but I don't imagine it can really be all that much.
Discussion
nostr:npub1xanjytp3clslynd2hxlnxg32jzz9wafxj9g4x6k28sjgljasd8wq3qjlvy fewer tags would make scraping easier than more tags
Rate limiting would make sense. Not limiting tags.