My question was specifically of why they were spawned from Match which was what the OP stated. They were not actually spawned from Match they were actually incubated under IACs Hatch [1].
Mars produces different chocolate bars for different markets Milky Way was a US product while Mars was an English product. Both Tinder and Match exist in the same markets.
Facebook owns multiple social networks b/c they were a threat to their business. Those are actually different products. The main differentiator between Tinder and Match is the Tinder is mobile-centric. FB did not spin up a separate start up under a different name when it launched it's mobile version did it? No because it had well-established brand awareness much like Match.
Apple also didn't produce a second company to launch the iPhone X did it? No because it had well-established brand awareness much like Match.
So yeah not so obvious.
Are you looking for the same thing on a dating site as your mother?