People couldn't enter my giveaway.

I think Serious Sam HD: The Second Encounter is a game that's not properly reported by Steam's API, so Steamgifts "thinks" nobody owns it.

I cannot see any new giveaway in your list
https://www.steamgifts.com/user/MCsquared

offttopic
Wtf in 2 months won 23 public giveaways? :D i won 6 public in 3 years what a sh&& my luck :D

Had same problem months ago ^^
u're not alone
https://www.steamgifts.com/archive/deleted/search?q=Serious%20Sam%20HD%3A%20The%20Second%20Encounter%20-%20Serious%208%20DLC
What i did? refund ¯\_(ツ)_/¯

Serious Sam HD: The Second Encounter is a weird library entry. Rather than counting as a regular game, the purchase is instead counted as a DLC for a free to play game. To enter for something, a user has to own the base, but as a DLC, it doesn't work well.

I'm not sure the F2P version still is available, but the game still works that way.

Nobory cares. SG is based on steam api, steam api is bugged, steam does not fix steam api, cg does nothing to fix it oh SG side. There are more issues of similar nature, all of them unresolved. Maybe someone from support can at least mark this DLC as free to remove it from the list at giveaway creating? If nobody can enter it - it would be better to just avoid those giveaways.