All new games purchased as a gift and placed in the purchaser's inventory will be untradable for 30 days. The gift may still be gifted at any time. The only change is to trading.

We've made this change to make trading gifts a better experience for those receiving the gifts. We're hoping this lowers the number of people who trade for a game only to have the game revoked later due to issues with the purchaser's payment method.

source: "http://steamcommunity.com/groups/tradingcards#announcements/detail/163582965920702191"

well, i have idea
what if i buying game, send it to my trade bot as a gift, then bot accept it and add game to inventory. then, someone, who wish to buy game, receive from my bot trade offer with payment method (keys, TF2 or Dota 2 items, another game etc). after complete this deal, bot will send to customer game as a gift too

this is real?

Sad to see the news.

I am discussing with Cara about how to 'continue' gift trading under this new rule, implementation of sending/receiving gifts looks like to be the only option. At the first glance of things we believe it is possible to make bots handling gifts, but I believe even the bot could accept it will be a pain for sellers to send a large amount of games as gifts with the Steam UI.

So, we will see what we can do and if things won't work out. I believe mass complaining to Valve should be a more viable option.

I dont think this really kills trading, but this definately makes trading different. Most of gifts just will sit in traders inventory for month and only then go out. This basically means end of near-zero profit trades (also read: extremely cheap gifts) which pop up a lot during sales.

thank you for your job Joto!

What if we send it to our bot, it accepts the gift and stores it in the inventory, and only THEN we send the second gift?
It surely needs an automatition... and considering after 30 days these gifts become tradable it might won't worth the time and effort to trade them before.