The surrounding counties have far different demographics and density profiles. Also, the article never stated if neighboring counties had decreased or increase

The surrounding counties have far different demographics and density profiles. Also, the article never stated if neighboring counties had decreased or increased aggregate tax receipts-- it only talked about online sales tax, which is a subset of all sales taxes collected: > But eight of the counties — everywhere but San Francisco — saw major jumps in online sales taxes, as high as 36% for Contra Costa County.