Adding more banks and maintaining them is not at all a problem for us. All banks provides net banking and stuff which enables us to transfer funds to our another bank within minutes. Though, 90% of the funds our customers deposits , is in AXIS bank, Not sure why our customers are not using ICICI for deposits.
I think it has something to do with the account number actually being a name. i honestly found it quite funny. And the other part being, i think the other time i tried doing an IMPS to icici, it got rejected. So never bothered with it and always transfer into axis.