I do not appear to have blogged about it, but the first time I brought up this issue was at the 2013 (Bali) or 2014 (Istanbul) IGF. If consent-based privacy rules are imposed on the existing concentrations of behavioral transaction-based data, there will be considerable to negative implications for SMEs and start ups on one side and for those engaged in data analytics for the public good.
It is interesting that the Economist is highlighting this issue:
Along with other tech firms, it should create an industry ombudsman whose jobs would include making access to platforms easier for independent researchers. Instead of opening up, however, the risk is that Facebook will throw up walls: its decision to kick third-party data-brokers off the platform has the convenient effect of both protecting users’ data and entrenching its power as a source of those data.