HypersomniacLive: 3. If their Western European and Australian/ N. Zeeland user base grows (as you say in a later post), the amount of money to compensate purchases of regionally priced games will increase. And so will the money needed for the 70% publisher's cut for games bought with store credit. If that user base becomes comparable or surpasses their US based one, then the Fair Price Package policy becomes unviable.
That depends on the excess amount the publishers decide to charge.
Let's assume the usual 70/30 split both for the regionally-priced game and the flat-priced game that gets bought with the store credit afterwards, and let's make the USD price $1.
US base price: 1
Regional price: 1+x
Publisher share: 0.7 + 0.7x
GOG share: 0.3 + 0.3x
Buyer credit: x
Publisher share of game bought with credit: 0.7x
Total GOG share: 0.3 + 0.3x - 0.7x = 0.3 - 0.4x
In other words, for every 10% that's regionally added on top of the base price, GOG's share is reduced by 4 percentage points, i.e. if the regional price in the example is $1.20, GOG's share is 22 cents instead of 30 cents. As a percentage of revenue the reduction is greater, of course, since that reduced absolute share comes out of increased revenues. (In the above case it's .22 / 1.20 = 18.3% instead of the base-price 0.30 / 1.00 = 30%.)
Anyway, as long as the regional pricing demands by the publishers aren't too extreme, GOG does still make money on the fair-price policy, and could conceivably even come out ahead if it leads to increased demand. And this doesn't incorporate the possibility that a certain percentage of store credit will ultimately go unused and expire, which would mitigate GOG's cost of the policy.