Thank’s for your gentle interest, I’m Responding to all of you guys to clear some things out around here, first of all this is not my website, but i know the person who created it, the assets presenting on the website are just a Showdown and promotion showing the product and giving a link to the legal and official Pack or asset to buy from i guess this answers the legal questions you have, the website provides amazing assets and packs that are not on the Marketplace not because they are inadequate or illegal, it could because they don’t present some features that Epic Games want like the number of assets in 1 pack for example, or that there is other links provided externally with some assets, something Epic Games can’t provide on their Marketplace, understand what i mean, i hope i answered your questions, i highly recommend that you check both the Marketplace and this website because 2 is better than 1, and you can get different things that you didn’t know existed.
ENJOY