Tinder was a match.com spinoff startup and they gave the founders some stock and money... tinder did well and then when they re-acquired the company they did so at a valuation that allegedly improperly compensated some of the shareholders.
Note: they weren't really founders. Tinder was created by Hatch Labs, which they worked for and was owned by IAC.
I thought it was important to point that out as that's at the core of this lawsuit. The team was given options, but it was majority owned and controlled by Hatch Labs / IAC. When IAC acquired it, they're arguing IAC should've paid more.