Paypal Digital Gifts via eBay is selling $100 eBay e-gift cards for $95. Unfortunately there is a very sad limit of 1 card per user id.
While eBay gift cards do not normally earn cashback through portals, you may be able to earn 5X points on this purchase with a Chase Ink card. My recent purchases have continued to earn 5X points as recent as a few weeks ago.
These gift cards are popular since they can be used to purchase other gift cards or merchandise on eBay at a discount. Deals like this have sold out quickly in the past, however this time it may stick around longer with the small limit. I would still probably purchase sooner rather than later if you are interested.