This applies to Reddit too to some extent:

AskReddit => Quora

MillionaireMakers => PoolTogether

Deals/Free/DiscountedProducts => SlickDeals, HotUKDeals

SideProject => Product Hunt

BuyForLife => goodcheapandfast.com

These are what I could remember top of my head. I'm sure there are others.

I think /r/mealtimevideos could be an independent service on its own.