The phrase "profitable deals" means making transactions or business arrangements that result in gaining money or making a good amount of profit. Full definition
With such a comparison, you will be able to gauge what will be the most profitable deal for you? (jeffadams.com)
But the central bank sets its deposit rate sufficiently low to encourage those banks to strike a more profitable deal with the lenders who are seeking funds to settle their accounts. (moneysense.ca)