Coupon : SBM2021 at namecheap you can use even if you are already customers with them 
I don't have so much information about terms of use. i used it to purchase:
1- new .com domain cost me $6.98 plus ICANN fees
2- new .store domain cost me $1.48 plus ICANN fees
3- new .me domain cost me $3.98 no ICANN fees
4- new .uk domain cost me $6.98 no ICANN fees
5- new .shop domain cost me $1.60 plus ICANN fees
I don't have so much information about terms of use. i used it to purchase:1- new .com domain cost me $6.98 plus ICANN fees
2- new .store domain cost me $1.48 plus ICANN fees
3- new .me domain cost me $3.98 no ICANN fees
4- new .uk domain cost me $6.98 no ICANN fees
5- new .shop domain cost me $1.60 plus ICANN fees
