Is this allowed ? Giveawaykings.net

Shit. . . Deadly Profits is made by the same people that made The Slaughtering Grounds. . . Now I have less faith in the game. Sucks because it looks like it could be interesting.

Now I don't know about the legality or morality of doing so. That is a question for a more seasoned member. Sorry I couldn't help you.

i think you can post links where ever you want. if people are "stupid" enough to pay moeny (watching an ad is like paying money in my book) for these links. their problem

The issue might be if you have to pay(view ad) to enter private giveaway i think.

A cautious yes since private giveaways are allowed to have more rules imposed on them than public ones and they can distribute the link anyway they see fit. However, this is a very grey area and I would wait for a mod to rule on this.

I think it is a problem if someone else is monetizing from this site. This would be the case if you put every link of any open giveaway on your own add-plastered homepage. Since in this case, they only link to their own giveaways, the problem isn't really a biggie - from my point of view...

Well, the giveaways are public, so you can find them here without going to that site.

I thought Valve asked devs to stop buying votes, not like they have anything to lose at this point though

It's normal for devs to giveaway free keys in order to promote their games, however people should see the Store Page before adding whatever trash to their libraries and supporting shit studios, subjectively speaking of course, everyone has an opinion and the collective of said opinion is what should decide what gets supported and what not (greenlit in this case).