[Question] is e-Gift card arbitrage possible Online?

As title suggests want to know about that.

• if possible, any websites to flip and make money from them

it might actually work. There are still websites where one can buy new virtual and physical gift cards. There are also marketplaces where people buy and sell used gift cards when for example they got one as a birthday gift but want to sell it because prefer cash.

I assume margins are rather low, you can't really sell 50$ gift card for 100$. Another thing is getting scammed by someone.

Good luck!

You can but they aren't really profitable, most sellers only make a $1-$5 per card sold.
You would also need to be cheaper than businesses much bigger than you so your profit would be even less.
Honestly, it probably wouldn't be worth trying unless you can think of a way to get the gift cards at a cheap price.