most direct airline offers are around 15 percent off direct from airline. very unlikely you willl get any takers for 7 percent via ota which is an inferior deal
Airline gift cards usually has to be bought in certain denominations which either won't be enough available to cover the whole fare or there can be extra funds left over on the gift card.
With this offer it's simple whatever flight your looking to book, and would pay the normal price for, I'll discount it 7% off the price.