Unlikely you can buy that amount through one site and also get the multiplier for the entire amount in one shot. Can do multiple sites. Possible if you have different cards (HDFC, Axis etc). Can buy on Axis Giftedge, HDFC smart buy, Intermiles (if you have miles) etc. Can also spread purchase...
Haan sirjee, you can get it through any path that ultimately lands on Axis Gyftr. All I’m saying is you don’t have to go through any other site. But one can do whatever makes them comfortable.
Buying from Axis white label Gyftr directly (https://www.gyftr.com/edgerewards) will give you the multiplier - 5x 10x.
There is no need to go through the Grabdeals site.