You seem to hint at it but I have not followed the issue with "foreign" apps on Ipads. I gather that apple is planning on taking a cut of sales, of say, Amazon/kindle books. But what if you purchase your books another way - on a computer or phone? Will the ARCHIVE versions of those books be available through apps on the ipad at no additional cost/premium? Can one use the ipad's browser and purchase from Amazon and avoid this issue or do they still get a cut of the sale?
Hopefully, if this is not something you know, others can answer or speculate.
And I apologize if this appears to be a hijack.