All corruption (and other dishonest ways of making profit or advantage) is graft, to attempt sell something under false pretenses is to grift [0].

Grifting is often among the techniques used to effectuate graft.

IMO, the upthread post reads better with “graft” which is a abstract noun, matching the use upthread, where “grift” is usually a verb (I've also seen it used as a concrete now for a particular operation in which the agent is perceived to be grifting.)

[0] Most dictionaries I think will still say this is specific to small-scale swindling, but I think that's a lagging indicator; IME, usage has drifted to be more generalized, with large scale operations often referred to as grifting.