They make people think they are getting something. They receive phone calls congratulating them and telling them that we have won a $50 prize, only to discover that to collect the prize they have to send in $5, $10 or some other amount.
Ils reçoivent un coup de téléphone qui les félicite d'avoir remporté un prix de 50 $ pour découvrir ensuite que pour recevoir ce prix de 50 $, ils doivent envoyer 5 $, 10 $ ou quelque autre somme.