In a different industry I've been through raids like the ones that are happening now. This is only the second stage or so.
The next markets that arise will be controlled by law enforcement, from inception to end. A major seizure is seen as an opportunity to herd people into more and more fed controlled sites.
Normally this is how these things go
1) Infiltrate website and take an admin position.
2) Gather information
3) Seizure and control of servers, accelerated information gathering.
4) Raid/Site Shutdown (we are here)
4.5) Use other compromised sites to gather information as people flee from the original sites to smaller ones
5) Widespread arrests
6) Using arrest as leverage assume control of a person or identity that is well known
7) To fill the void launch a new site(or several) 100% under control of law enforcement from beginning to end using the well known identity.
8) Rinse, lather, repeat.
Once they have arrests on this scale, there will be rats everywhere. Keep your opsec tight and chill for awhile.
Some relevant reading:
https://www.wired.com/2007/01/i-was-a-cybercrook-for-the-fbi/
The justification for creating a site from scratch to sell drugs on and catch users is far larger than capturing an existing site and running it for a period of time. The site would have to run for ages in order to build a decent user base with anybody worth busting and by then they would've spent tens of thousands and helped countless users buy drugs, possibly even kids. I don't think you will ever see that happen, the cost benefit is completely out of whack.