Hdfc Millenia 50000 Retail spend Ideas for ltf conversion of credit card

Hey all.you allay know hdfc offers ltf cards if retail spend of 50000 is achieved in 90 days.
any ideas to achieve retail spend of 50000 without additional charges or less charges?

1) Rent payment using cred -
cred collects 1.75% as tax. so 800 additional amount should be spend (approx 50800) and hdfc provides 1% cashback (500 rs).. net loss is 300rs.

also is this spend retail spend and will this be considered for ltf??

2)rent payment on other apps Nobroker etc. Flat 1% charges
so additional 500 rupees charge from Nobroker and 1% cashback of 500 cashback for hdfc. no loss

also is this spend retail spend and will this be considered for ltf?

3) Nps payments. payment using credit card charges 0.75% and 18%gst

50000 of 0.75% is 375 rupees and 18% gst on 375 rupees is 67.5 rupees..total 442.5 rupees and POS charges some 50 rupees..total 500 rupee charges and 1% cashback from hdfc of 500. no loss

also is this spend retail spend and will this be considered for ltf?

4) spend in petrol bunks

regular retail spends

any other ideas
1) gift voucher? detailed explanation please or links? any transaction charges will be levied? is this a retail spend and will this be considered as ltf

2) ppf payment for sbi ppf account using hdfc. any transaction charges will be levied? is this a retail spend and will this be considered as ltf

any more ideas with detailed explanation helps