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Need Advice on Amazon Gift Card Strategy with HDFC Infinia & GST Payment Options on BizBlack.

TripleAce

TF Select
VIP Lounge
I’m new to optimizing credit card rewards and could use some advice.
Here’s my situation:

Back in August 2024, I got the HDFC Infinia card. Around the same time, I enrolled in a Malabar Gold scheme with a ₹40,000 monthly EMI, which I was paying online/offline using Infinia, earning ~3.3% reward points.
Later, I joined TechnoFino and learned I could buy Amazon gift cards to pay Malabar, getting ~12% reward rate (after processing fees) with Infinia. Problem is, Infinia on SmartBuy has a ₹10,000 monthly limit for Amazon gift cards, and my Malabar EMI is ₹40,000, so I couldn’t fully utilize this benefit.
To cover more, I started buying ₹10,000 Amazon gift cards with my Amex card as well, but I still couldn’t hit ₹40,000 because I ended up using the vouchers for gas bookings, Jio recharges, and other stuff.

I read on a TechnoFino thread that you can use different mobile numbers on GyFTR to buy ₹10,000 Amazon gift cards per number per month so last Saturday night I created a GyFTR ID with my second mobile number and bought ₹10,000 Amazon gift cards.
Created another GyFTR ID with a third number and bought ₹8,000 Amazon gift cards and paid Malabar with Amazon Pay.

Now, here’s where I’m confused:

1. Will I get reward points for these transactions? I’m not sure if using multiple mobile numbers on GyFTR is allowed or if it’ll affect my rewards.

2. Is this strategy legal/allowed?
I don’t want to get in trouble with HDFC or GyFTR for using multiple numbers.

3. My wife has an Infinia add-on card, but since it shares the same card number, I assume I can’t use it to buy more Amazon gift cards. Correct me if I’m wrong.

Another issue: I got the BizBlack floater but I’m not sure how to use it effectively. I already have GST input credit of over ₹8 lakhs(Individual GST), so I don’t know if I can use BizBlack to pay GST for my company in which I’m the Director, and still earn rewards. Are there other ways to maximize BizBlack for the 7,500 reward points?
I can’t cover ₹50,000 per month on insurance payments.

Would love to hear your thoughts, especially from those who’ve navigated similar situations with Infinia/BizBlack or GyFTR.

Thanks for the help!
 
1. Yes
2. Yes.
3. You are correct 💯
Gyftr will not allow the same card number to buy more.
Whoa!
You mean to say I can use 4 different mobile numbers and create 4 different GyFTR IDs and buy ₹40,000 worth additional Amazon gift cards with the same Infinia CC per month? 😳
 
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If you really want to not risk it, ideal strategy is to have 3 add ons with different card numbers in the name relatives/parents/spouse and use 4 different gyftr accounts with diff mobile numbers. HDFC is providing add-ons with different card numbers now

Same card number being used on 4 different gyftr accounts may lead to gyftr accounts being blocked in future

GST payments are eligible for accelerated rewards on Biz black. You can do it
 
If you really want to not risk it, ideal strategy is to have 3 add ons with different card numbers in the name relatives/parents/spouse and use 4 different gyftr accounts with diff mobile numbers. HDFC is providing add-ons with different card numbers now

Same card number being used on 4 different gyftr accounts may lead to gyftr accounts being blocked in future

GST payments are eligible for accelerated rewards on Biz black. You can do it
Thanks for your reply.
My wife has an add on but with same card number so if she applies again stating that her card is damaged, will she get a new card number?
Can’t have more add ons as my son is 8 years old, mother is 80 years old and no one else is there in the family.

Regarding GST on BizBlack, I am GST registered as an individual but I have more than 8 lakhs in my GST wallet which gets adjusted every month so I don’t have to pay any GST till the 8+ lakhs is exhausted.
I am the director of a Private Limited Company so is it possible to pay part amount (say 50,000 per month) of the GST of the said company from my BizBlack?
 
Thanks for your reply.
My wife has an add on but with same card number so if she applies again stating that her card is damaged, will she get a new card number?
Can’t have more add ons as my son is 8 years old, mother is 80 years old and no one else is there in the family.

Regarding GST on BizBlack, I am GST registered as an individual but I have more than 8 lakhs in my GST wallet which gets adjusted every month so I don’t have to pay any GST till the 8+ lakhs is exhausted.
I am the director of a Private Limited Company so is it possible to pay part amount (say 50,000 per month) of the GST of the said company from my BizBlack?
Yes possible. Any GST paid using Biz Black via HDFC payment gateway on GST portal should be eligible for rewards. If you don't have GST payments then pay advance tax, it will also work
 
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