If you buy something ...
... then you have a right to use that product, if the vendor stops providing a service that limits what was purchased then like cars you should have the right to obtain replacement parts/repairs via other vendors.
I am all for creators retaining control of their products but in the event that the creator looses interest in maintaining a product then irrespective of any get out claus the buyer should have a right to continue using the product they purchased even if that requires modification of the product to keep it running.
At the moment there are lots of publishers taking money and then later removing what the buyer has purchased without returning their investment. I would say if a publisher takes money for the use of a nonconsumable product then the buyer has a right to use that product indefinately. Presently virtual possesions are not protected at all and too many vendors are abusing this loophole to exploit consumers without fear of reprecussions.
Until the playing field is level then I have zero time for the complaints of publishers, they want to take everything and give nothing in return. If you have taken my money then I own what I purchased irrespective of any legal doubletalk you might have forced me to click through, if a vendor fails to maintain the product then I have a right to maintain it myself to retain what I purchased
All money is afterall just another virtual item and other virtual items should be treated in the same fashion