take it, if you utility bills combined(except Airtel) is more than 6000.
eg. electricity bill 4000
you will get 200 on axis ace but on. airtel you will get 300.
after you get 300 do all other utility bill payment via ACE.
as far as I know, with plat charge card you can add 4 companions cards. since you are a plat charge card member please ask customer card, they might give special consideration for your request.
time to time they give offer to selected customers. last offer ended on 31st Dec.
they were offering to add MRCC as companion card to Plat Travel card or your Gold charge card.
if you have ICICI Bank account, call the customer care number and ask for invite.
I have not tried it myself but one of my friend got invite, they will put you in interest/priority list and give you invite as soon as they start adding new customers.