One click clears the whole list
Open Gmail's Manage subscriptions page and press Start sweep. It unsubscribes from each sender, about one a second.
It goes through every sender on the page, and there's no undo.
- SShop Daily14 emails a monthUnsubscribed
- TTravel Deals9 emails a monthUnsubscribed
- AApp Updates6 emails a monthUnsubscribing
- CClub News4 emails a monthWaiting