Have old gift cards? Turn them into RP.

Subway gift cards, burger king cards, and more can be turned into RP. On the "purchase RP" section in the client, scroll to the second last option; you can use gift cards there.

So how do you get gift cards for free? Bing Rewards - I don't like "promoting" but they basically pay you to search. Use the credits to get burger king cards, then use that to purchase RP. Here's my referal link (you don't have to click it, but I get bonus points, and I really want to spend it on pool party rek'sai :)