[shoo]

some businesses sell dating & matchmaking services to the market of single people.

it might be hard to bootstrap such a business and compete with established competitors with major market share as the value of a matchmaking business surrounds growing a marketplace of people to offer many possible opportunities for matches to people who sign up (it might even be a bunch of different sub markets, some two sided, some one sided, etc).

i believe plentyoffish (founded by a single single person, iirc) tackled this by initially offering a free service without any revenue source, until the value of the business was realised by selling it with its large free userbase to an established competitor.

another downside of a dating & matchmaking business model is (at least for some segment of customers) if you succeed in making a good match for them then you remove them from your target market, and they cease being customers.