I would have to disagree with not getting a warrant to watch customer list, it’s not the customer list they would go after, it would be the order history and incoming packages. These can be used for several means.
1. Product order for potential distributors.
2. Product orders for manufacturing.
Easily obtainable especially with plenty of evidence on the forums, his images on Instagram of his young cousin capping drugs etc.
Would they ignore the the 200$ orders and small placements? Probably... but as I’ve seen many brag about 2,3,4K orders... you bet they will snag those at customs and follow those packages... it’s how leads turn to busts. When you have several points of evidence it makes the case easy.