Well I don't object to them giving me a coupon or three but for the exact same game? Somebody in marketing either has a sense of humor or is totally clueless!

People who bought their Humble Bundle got six coupons. So...

I got:
Strike Suit bundle
Scorchers DLC
Max Payne 3 Season Pass
Risen 2 Gold
Alan Wake CE
Fallout: New Vegas: Ultimate

So, all in all, a respectable haul.

I did, and I'm annoyed that there's no option to delete them. Nobody's going to want them so now I'm going to have to go to the trouble of dumping them in a junk alt account or look at them in my inventory until Friday 11th July 2014.

Does that beat 6 x copies of FM2013 Summer Getaway cards? LOL

Damn those Always Online shops! :p

Steam inventory needs a Fireplace to burn unneeded coupons. I have one for Toki Tori 2 and that's one too many.

That was my first steam sale, so there was some damage...
I got:
Max payne 1 & 2
GTA IV bundle
GTA III trilogy (I know, I bought it before there was the complete GTA pack for the same price as the GTA IV bundle, as I said, I'm a Steam sales noob who didn't know I had to wait...)
Bioshock 1 & 2
Fallout 3 GOTY
Fallout NV Ultimate
Portal 1 & 2
Bully
Torchlight 2
Half minute hero

I think I spent about 50€, so it could've been worse I think. Skyrim was looking at me but I managed to resist.
This should keep me busy some time.

You can delete coupons. I think you can delete anything you want from your inventory. I know I deleted some coupons I didn't want very recently. I think when you select them and then look at the description/options for the item in the lower right corner of the window, the option to delete is there. Either that or I right clicked it but I think it was the former.

Can you sell the coupons? (Should be a green "Sell"-button there when you look at it in your inventory)
If yes, then just dump them to the marketplace for a cent or two, someone will eventually pick it up

The coupon is: Tradable, Not Marketable
And no way to delete it, too.

EDIT: grviper said it better than me :P

Must be special coupons then and no I don't think anyone is stupid. I can honestly say I have recently deleted useless coupons from my inventory but they were not these specific coupons.

Hm, but I do think you can delete the coupons when they are no longer valid. I deleted a couple of invalid coupons this week. So it is just a matter of waiting.

Sidenote - I just sold all my summer cards, and it brought in just enough to get me the Giana Sisters game on -80%. So in a way, Valve gave me a free game this summer :)