The next step, now being gingerly debated in Lib Dem circles, might be actual entry into government.

ECONOMIST: Terms of engagement

For example, although demand for higher education has fallen in England, the actual entry rates for young people are close to trend.

BBC: Record fall in university places taken up, says Ucas

Yet as it turns 17, critics discount its effectiveness and claim that it causes salespeople to do more data entry than actual selling.

FORBES: The End of CRM... As We Know It?

This chart looks at only one entry point, the actual Billionaires home page.

FORBES: Update: Charting how consumers "Path" through our Billionaires list - Forbes