He's talking about hosts that offer promo pricing (loss leader pricing) on their packages to get you to go with them, then after the promo period raise the rates to normal rates.
1and1 did this, giving away some very sweet hosting deals for free, for one year, no strings attached...
But most hosts do it during their startup phase to attract new business... The perfect time to avoid a host when you've got some interest in ensuring your sites have sufficient uptime.
I found this great host who will host your site for free... check them out.