Agreed, nice post. I ask myself this question (i.e. what I'd actually pay for) when trying to gauge if customers will pay for something I'm building. At first I often think "Yeah, I'd pay for this", but then reality sets in. Even making this list now I'm surprised how few services I buy.
* Linode
* iDrive
* Skype
* Laundry
Yes, laundry as in washing clothes. I'm currently in SouthEast Asia and it costs US$1 to have all of my clothes laundered, line-dried and ironed. If this were survey.io, laundry is the services I'd most miss if it disappeared.