You do realize he'd lose a LOT of money shipping internationally that cheap, right? The least expensive option to ship a single deck from the US to the UK is International First Class, without any added features like tracking and such, not even insurance. Even in an envelope, it would qualify as a package due to the rigidity of the box inside - envelopes are meant for soft, bendy things like a t-shirt or a small stack of papers, maybe a magazine or something. That makes a 5-ounce package (approx. 3.3 ounces plus packaging) cost SIX DOLLARS AND TWELVE CENTS. Two decks? Assuming ten ounces of decks and packaging, that's over ten dollars in shipping. Shaving an ounce off in packing materials doesn't even change the price - it's $10.03 either way.
I understand where you are coming from but if you follow my logic the fact it costs $10.03 to ship internationally is moot. What I was saying is that by charging a nominal fee on all decks he would be in the same state as with free domestic shipping. Regardless of whatever prices shipping costs lets say he ships free to the states, and charges $7 international shipping (estimate of course). Now lets assume the deck is a success with 600 backers. 80% from the USA, and 20% from around the world. For all his shipping costs to everywhere he has taken $840 ( International backers * Money for international shipping). Now let's assume he gets rid of the $7 international shipping, and puts in a charge of $2. Whether this comes as a shipping charge or is built into the decks or whatever. Assuming the same percentages - he now gets $2 from every backer, which is $1200. As you've pointed out, he is losing on international costs, but he is minimizing his loss on free domestic shipping. Even if he charges $1.50, he still takes $900. He won't lose any money compared with what he was already looking out.
However I do understand the point about a surge in customers from outside the states if shipping is too low. But I mean it's all about percentages, my maths is correct and if he can fudge the numbers enough it will work. Maybe $2 is too steep as utterfool mentioned but how about whatever the price of the deck add $1.50. Say free domestic shipping and then say $4 international. Lets face it, when people do kickstarter decks they aren't short sighted enough to say it costs $3 a deck, i'll charge $8. Oh man shipping is eating my profits. They say it costs $3 a deck, if I charge $3 a deck to cover a little bit of shipping costs, and then a $2 a deck as profit, count in that to get this I have to beware of 10% charges so to make this I need $9. Then they set a figure around that and add on international shipping. The whole free shipping is rubbish, because the shipping is taken care of in the actual price. Nobody loses overall unless you do a loss leader thing like Alex.
The extra $1.50 will blend into the deck and the $4 international shipping will be countered by that extra $1.50 Even with a surge in international demand he only needs 3x as many USA customers as world wide. BECAUSE lets say he gets 75% USA, and 25% International (from 600 again). More international have come because shipping is cheaper. Before I showed that the money taken from shipping would be $840. Now he has 480 USA customers paying $1.50 which means $720, and he has 120 international customers paying $4 which means another $480. All in all its $1200. Now the key thing here is that there has been a swing in the international numbers which means shipping costs WILL CHANGE. However you'll have an extra $360 to cover the 5% increase in customers from outside the USA. 5% is a quarter of what you originally had which you allocated $840 to. $360 is more than a quarter and so your as you can see pricing isn't that bad.
All of this are just theoretical figures to prove that my maths was not bad, and that it isn't the worst business and that it wouldn't destroy all his profits. It's based upon the logic that 'guaranteed' you will lose money on shipping by paying for the shipping out of what you take as shipping charges. So you factor in a little bit of money per deck so you don't lost money. Decks have succeeded with the strategy. Nobody calculates to lose money, what is an apparent loss per deck, is made up for through the profit. If you either increase the deck charge, or the shipping charge on domestic shipping you are ADDING to your profit, so when you DECREASE international charges you only lose what you have gained from the extra charges. It's quite simple.
In both cases he gains a little more than previously expected (factored in to account for increase backers, etc). The only thing I did overlook is that as Utterfool mentioned, perhaps an extra $2 will stop people from backing and that made be so. Its all about marketing I suppose. You do what is the best for yourself - I was just making a case for cheaper shipping, not demanding it.
I know about business, and I am good with figures so disagree with me but please don't condescend me. It was merely a suggestion thrown out there. He asked for feedback and I threw in my two cents and then the whole wallet, in the end we are all just spitballing here.