Developer Rare is hoping to cram lots of players into Sea of Thieves “to test a lot of the work we’ve done since the Closed Beta, and to try and hit a higher concurrent players number than we’ve ever seen before.”
If you were part of the closed beta, the announcement post reads, you’ll be able to participate. ”
As a result of the Closed Beta, we are planning on running a couple of Scale Tests between now and launch, with the first of these beginning on Friday, February 16th at 10am GMT (2am PST) and ending on Sunday, February 18th at 10am GMT (2am PST).”
Keep in mind, that this scale test may be filled with rocky seas.