Quote:
Originally Posted by cptbutton
tl;dr: It also happens with the core books together vs separately, the GURPS Traveller books, and the Vorkosigan book.
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For Traveller and Vorkosigan, I suspect it's because the products were deactivated after the licenses expired and when a new deal was reached they were put up effectively as new products with no connection to the old ones. The Basic Set Bundle is far more akin to the GURPS 20th Bundle.
One other nicety that Drive-Thru has is that if you already own items in a bundle it will discount those items from the bundle, allowing you to take full advantage of a sale or special bundle price on the remaining items that you don't have. They have a lot more bundled items there, but one of the nice perks of this is that you can buy a small item from a bundle to check it out and decide if you want to purchase the entire bundle or not and all it costs you is the discount on the one item you purchased.
Such a bundle discount, taking into account items already purchased, can incentivize people into buying all the remaining items in a product line.