Traders offering gift links. Anyone with experience with these?

Are you sure these were Steam gift links? Looks more like Indie Gala gift links or Humble links.

Do you rly think people random add others to offer free gift LINK's are legit ?

come on you can't be that innocent

You can still get gift link, but it won't automatically add a game to your account - it will show you the key to activate it.

(about Humble or IG links)

You should always be very cautious about clicking any link. Whenever possible, copy & paste the address yourself, in case its a masked link.

As for whether people can still trade legitimate gift links, yes.

The OAuth (or whatever it was called) thing is long gone. But you still have the option on humble bundle, etc to generate a gift link that can be used to obtain a Steam key. Why people don't just obtain the Steam keys and trade/gift those I don't entirely understand - but there are certainly at least some legit traders who just prefer to give out the links.

I see that more information is necessary.
Here is the traders thread i was referring to.
http://www.steamgifts.com/trade/zv9Pa/h-dont-starve-hitman-absolution-darkest-dungeon-xcom-isaac-w-csgo-keys-elite-dangerous#l0MXx0m

'gift links' are just that, it is the url steam sends out when you choose 'send gift via e-mail' in the client. you can send that email to yourself, and then you have a link you can easily send to whomever you want, even if you do not know their e-mail address/steam profile.
for example, one i recieved a while ago (so no, it will not activate for you :P) : https://store.steampowered.com/account/ackgift/DA6875492B0BEC29?redeemer=