Someone at that *other* site - pretty sure it was Phen - had a great way of putting it:
Pre-Seed does not increase your odds of conception. It's not a fertility booster.
It only doesn't decrease your odds of conceiving (by killing off sperm as some lubes do). If you don't need lube, don't use it. There's lots of anecdotal evidence ("first cycle we used it, we conceived!") which is great, but if it wasn't coincidental, and was related to lube use, it was due to the discontinuing of sperm-killing lubes, and not due to the introduction of a sperm-turbo-charger.