LinkedIn market breakdownLinkedIn 数量/分类/门槛US$100+ revenue shareUS$100+ 收入占比Social actors over US$100US$100+ 社交清单High-traffic, unmaintained高流量却没维护Low-competition AI scrapers低竞争的 AI 爬虫Forced rental→PPU被迫 rental→PPU 迁移
twitter 爬虫有多少，分几类，月收入超过 $100 的占比多少
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