I purchased a Sun Pass in January and took the first flights last week, which also put me over a threshold. This morning, both the 12 eCredits for the purchase and the the threshold credits showed up. They show as Flight Pass and Promotion credits, separate from the 10 goodwill ones that we received earlier.

I'm not sure if the FP credits are tied to the first use of the pass or not. I was on the point of calling when they appeared. And the credits are for the purchase of the pass, not who flies.