Every dating magazine
Dating firms also suffer from an inherent conflict of interest.
Assortative mating, the process whereby people with similar education levels and incomes pair up, already shoulders some of the blame for income inequality.
But the feedback loop between large pools of data, generated by ever-growing numbers of users attracted to an ever-improving product, still exists.
The entry into the market of Facebook, armed with data from its 2.2bn users, will provide clues as to whether online dating will inexorably consolidate into fewer, larger platforms.
Online dating is a particular boon for those with very particular requirements.
Jdate allows daters to filter out matches who would not consider converting to Judaism, for instance.