If you sign up you automatically get 10 memepoints(equivalent to $10 USD) which you can spend on their products.
UPDATE: use code TRYMEMEBOX for $15 off your purchase. Enjoy!
If you then use the discount code MEMEBOXKIIP you get another $7 off your purchase, which you would otherwise have to spend on shipping. This expires in the end of June. You can get makeup at absolutely no cost!
If you have any questions leave a comment below I'll try to answer it as best as I can. I haven't tried this yet but I will soon when I find something that I like. Good luck!