Today a Steam Blog-Post revealed, that from now on there are extreme changes on how gifts work on Steam.

These changes seem to be a try to reduce the amount of grey keys sold by key-resellers like G2A:

STEAM GIFTING CHANGES
4 MAY - KRISTIAN

Today we’re announcing changes to gifts on Steam. The gifting process has had a bunch of friction in it for a while, and we want to make it easier for you to share the games you love with friends. Steam Gifting will now be a system of direct exchange from gift buyer to gift receiver, and we will be retiring the Gift to E-mail and Gift to Inventory options. Here's a quick breakdown of benefits from the new system:

Scheduling Gifts Is Even More Straightforward
Go ahead and buy a gift months in advance and have it delivered to a friend on time, every time.

Declined Gifts Resolve The Way They Should
In the old system, a declined gift would sneak back into the giver's inventory and remain on their bill. Now, if a recipient already has the title, or just doesn't want it, they can click decline and the purchase is refunded directly to the gift giver.

Safe Cross-Country Gifting
No more worrying if a Gift to E-mail or Gift to Inventory is going to work for a friend, gifts sent through the new system will always work on the receiver's account. When there is a large difference in pricing between countries, gifting won't be available and you'll know before purchase.

These changes are now available. Please let us know if you see any issues or have any feedback.

Note: Pre-existing gifts will be unaffected by this change.

Currently 1.285 mostly negative comments below this blogpost seem to show, what the Steam-Community thinks about this: they are not amused.