does anyone know of any companies that provide cards that will "double" your savings deposit. ex. $2500.00 in the bank and they issue you a card with a limit of $5000.00? or even any website they may offer info?

I believe what you are asking is who offers a secured card with a credit line that is 200% of your deposit. With Sterling Bank your credit line is 120% of your deposit. Capital One offers a secured card with a credit line that is up to 500% of the deposit, but the maximum line is $500. I will let you know what other products I find.