Accepting determinism and the insuing dissolution of free will is often feared as something that would lead to loss of will and fatalism. Gary Drescher and Eliezer spend considerable effort explaining this as a fallacy.
The one thing I don't remember mentioned is the opposite effect (but maybe I missed it) - if you experienced a failure to accomplish something, the free will explanation is likely to make you stop investigating the root cause, leaving it as a mystery. Once you accept determinism you know that a failure is determined by your mental algorithms, and should be much more motivated to push the investigation further, making yourself stronger.
A discussion of millenarian groups might be in order. Communism might be the first secular one. These causes motivate followers to sacrifice for them while teaching the inevitability of their success. The supposed surety of success makes the followers feel their efforts are not wasted, but the supposed inevitability of it does not demotivate them - that's the interesting part.
I think this usually coexists with traditional, dualist views of free will, but am not sure.