codes on diapers?

So after 4 months I realized there are codes on.diaper packages...what are they for?

You can sign up on their website and enter the code to get points. You can then trade the points for rewards.

I signed up for Huggies and honestly didn't think the rewards were that great. I was hoping to get free diapers or wipes or something, lol. Oh well, I'm going to be switching brands anyway because I think they're irritating DD's skin.

Oh ok. Well that's a bummer the rewards suck lol.