Sort of... The way that they work, is that you put down $300 lets say to secure the card. You then use the credit card as you would any other. If after 1 yr you have had a good standing (no overlimits, no missed payments, etc) they will refund you the $300 and it becomes a regular revolving line. They get the $300 off the bat for the "higher risk" clients in the event that someone defaults the company doesn't take a loss.
Plus clients are more apt to use the cards wisely since they had to put money down in the first place to use them.
I got my secured card almost 2 years ago, started with $300, got my $300 back after a year, and my balance since has increaded to $1500 doing nothing but buying gas on the card and PIF every month. You do pay a $59 annual fee, and interest on the card, but it's the price you pay to build your FICO unfortunately...