Goodgecko just never made any meaningful amount of money plus it was a competitive space (surveys) so it was shut down.
Peashoot did ok but in the end there were too many free competitors (twitter analytics).
I think if the same thing happened now, I'm a more experienced entrepreneur so I'd be able to deal with free competitors better - figure out what customers are still willing to pay for, aim for the enterprise market etc.
This reminds me of a locksmith featured on BBC's Rogue Traders who is now sentenced to 4 years in prison after he was found guilty of defrauding customers since 2002.