Checking on Terra Invicta through that store. (https://store.epicgames.com/en-US/p/terra-invicta-5bbf09?epic_affiliate=lowcygier)
Indicated price was US$ 18.75. Actual price was $27.99 (30% off regular). Best guess as to difference? gg.deals assumes I have the Thanksgiving coupon, which 1) I never did, and 2) expired roughly a month ago.
This also affects historical lows. This means that it's harder to judge a "good deal" through gg.deals than I thought it was, because a number of the "historical lows" for games of interest to me were through the Epic Games store. Press 'X' to doubt?
Respectfully yours,
Fred Firecracker