What do you do with your credits?

For those of you who use entrecard out there, what do you do with all of your credits? I was thinking about this last week as I realized that I had an insane amount of credits, even with buying ads. I decided to see what I could do with them. I thought about selling them, but once I read that you couldn't do that anymore, I changed my mind. So, I went over to the newly opened Entrecard Market and I must say, there really is a lot of cool stuff over there. So far, I haven't bought that much, but I did buy some really neat vegan lip glosses. Anyway, other than using them for ads or at the market, what can you do with your credits?