There's a lot of Mickey Math going on.
I would not personally allocate a "new card" bonus to a
DVC purchase unless I couldn't meet the required spend any other way. For example, suppose I wanted to open a CSR for a DVC purchase. 125K UR points! Awesome! Fine, but it only requires $6K over three months to hit the bonus, and I can EASILY do that WITHOUT buying DVC.
So, really the only "extra" thing that DVC gets me is the standard earn for the purchase (which is still worth something!), plus any difference in earnings I got to keep by putting the required $6K on some other card vs. the CSR, which in most cases probably is not much. Depending on the spend category and the other cards in my wallet, that delta might be
negative. In other words, I might still have $6K of spend over three months that is best placed on the CSR anyway.
Rather than bend over backwards to justify a purchase that I want to make, I've gotten to the point where I can buy it simply because I want it. It doesn't also have to be the Best Deal.