My experience with this concept is that the folks open the account, put in the minimum required for the higher CD rate - and then look for a way to take the balance down as low as it can go without incurring a service charge - These accounts RARELY get used as a transaction account......
Unless your program is detailed and fully automated these programs generate more work than they actually benefit you.
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My comments are absolutely no reflection of, nor influenced by, my employer - take them at your own risk.