the online amazon store on amazon.com
sainsburys
No. Amazon gift cards are only good for purchases made off of the official Amazon online store and the same can be said for Target gift cards only being able to be used within any local Target retail store. You can purchase Amazon gift cards at Target to use at Amazon.com, but that gift card will not work for purchasing anything at Target.
I personally am not aware of any store that currently sales Amazon gift cards. As you know, you can buy them from the website directly or I just read that Coinstar offers Amazon gift cards instead of cash. I also heard that Safeway in Californian offers them.
You can buy green tea powder at most health food stores. You can also buy a GIFT card from a store and use it to buy green tea powder on Amazon. Just be sure the gift card is from a major credit card company like Visa and not a store gift card.
A Chase gift card is actually a prepaid Visa gift card. The only difference is that it is sponsored by Chase credit card company. You can use this card anywhere that accepts Visa, even online and buy what you want.
There are no gift card generators - they are spam.
buy a amazon gift card presumably
Whatever retail store that the gift cards are for should have a page on their official website where you can check your gift card balance. Sometimes you will find it in their gift card section, but some sites require you to be signed in and check the balance in a different area, such as "my account".
you can get American express gift cards at your grocery store and they can be used for anything also, Amazon gift cards are probably a good idea. That site has anything and everything someone could want. There are also universal gift cards that let the recipient choose from hundreds of stores nationwide. The recipient chooses the store or stores and redeems their Gift Card for the actual merchant gift cards of their choice.
A card, cheap tiara, toys, anything at the dollar store.
You can purchase a Kindle Fire gift card at Amazon and in most countries where Amazon is available.