Advertisment invasion in your banking account

Advertisements are a proven way to make money. In some cases it is the only stream of income for online companies that do not want to charge money for subscription to their websites. The banks are starting to explore this lucrative way of making money by mining data from their customer transactions and linking their shopping patterns with the marketing plans of certain retailers: supermarkets, restaurants and apparel stores.
A private American startup, Cardlytics, is a leader in this field. It works with the Bank of America on analyzing the transaction data from its credit card accounts to sell the targeted advertisement to retailers.
 Here is how the Economist describes the mechanism of this business mode:
"A supermarket might be interested in customers who spend $100 or more a month at rival grocers but who have not entered its own stores for six months. It might then offer these people a 20% discount on their next shopping trip at its stores.
Cardlytics would insert an adverstisement to this effect into these customers' online-bank statement".

Apparently, banks recently have been struggling to maintain profitability. Low interest rates and consumer legislation are blamed for this.

So there is an attractive opportunity for many financial institutions. So much so that the company is now working with 327 banks that reach 78 million households in America.

The fee for canny advertisement placement is 10% of the price of the purchase made by the customer. Half of it goes to the bank and the other half to Cardlytics.
The click through rates are more than impressive at 15% to 20%. Only 1/3 of all offers are redeemed.
Visa and Mastercard have joined the race in mining transaction data to increase their revenue.