@Andrew
But you have to take that one step further Andrew, and actually look at of those who valued their data at 140 quid - how many actually took their search/email etc business away from Google. And that's without getting into the fact that that 140 was the total for all data and all its uses.
If they didn't move away from Google - all it confirms is that they value Googles services to the tune of £140. all you have done is confirmed Tims point but disputed the actual "fer instance" value he chose.
Now Im hoping that increasing valuation of data is an indicator that the Tech giants are going to get a shock - but the realist in me suspects its going to be over a very long timescale.
And as for Market Destruction - I don't think you should conflate the services Google provides to earn its revenues with what it does with those revenues. For instance you might be perfectly happy with Googles use of your personal data but not with its destructive intentions for Copyright, or vice versa, or be one of a large group that don't like either - but they are essentially 2 separate things.