RuneScape:Requests for deletion/Thieves' Guild quest series

Thieves' Guild quest series
This isn't really a quest series at all... it has one quest in it, with some optional, hidden miniquests that can be done after that quest. Since when are miniquests considered part of a quest series? Jagex hasn't confirmed any sequels to Buyers and Cellars either; the Thieves' Guild is complete anyway.