Regarding your second question (above), here is just one possibility:
A while back, Bank of America had a scheme to increase deposits in their non-interest-bearing savings accounts. The bank promoted this scheme as an easy way to grow one's savings balance, by rounding debit-card purchases up to a Whole number and depositing the difference into a linked savings account. To kick off this latest scheme, Bank of America offered an introductory bonus -- they would match each of those round-up deposits with their own money (up to $250 per account). So, I opened four debit accounts, each with their own card, to grow my savings.
For every $100 of debit-charge round-up, Bank of America deposited $200 into savings. That's a $200 balance increase for every $100 effectively transferred from debit to savings (or, $200 per $100).
Not the easiest $1000 I've ever made, but it was fun finding ways to make $0.01 debit purchases.
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