In response to your ticket
https://www.steamgifts.com/about/faq

Does my Steam profile need to be public to use the site?
You'll need to switch to a public profile when registering, so we can confirm you have a legitimate Steam account that meets our minimum requirements. From that point on, you can use the site with a private profile. However, if you wish to enter giveaways, the site will ask you to switch to a public Steam profile once a week to bring your account up-to-date.

So i can only make my profile public once a week and participate day by day in giveaways? i'm curious because ive noticed a lot private profiles in my giveaways.