I remember that site! Glad to see it's still going.
It started as a way to find free numbers for companies which try to get you to use their own premium rate lines. Now we have entirely useless grifters tricking people into calling free numbers via their very expensive service, even when the organisation getting the call does not want them to.
And PSA thinks it's fine to cap them at £40/call. Even though that probably means they'll just cut you off at 10 minutes in the hope that you'll call back and waste another £40.