Stagnate and die
When it was launched, Friends Reunited was a real pioneer, a brilliant and original idea that was well executed. But, along with the rest of the world, when I discovered that I could catch up with long-lost old friends for free via Facebook, while Friends Reunited was still charging, I switched to FB and didn't look back.
Friends Reunited was in a brilliant position and had the potential to be what Facebook is today in terms of market share and popularity. Instead, they took the money-grabbing route - let's call it the Microsoft Way - charging people for what they can get for free from an alternative supplier, and the inevitable seems to be happening.
It's a shame, given that FU was a British invention and FB is the later imitation from over the pond, but that's the way of the world, isn't it?