In this case, credits.
Once per update / Twitch Drops season.
We have the full list of NA CCs available here:
Many of which have amazing content on both Twitch and other platforms, I would recommend checking them out too!
Fem,
Pretty much yes.
After a patch is released, drops typically go down for 24-48 hours to be re-configured for the new content.
That is all that is meant by that.
Fem,
The Twitch Port, was a limited time promotion tied to a Twitch Prime promotion in March 2018. It is not currently available and is not granted from linking your account.
As per the article, you will receive the following achievement when your account is successfully linked:
If you have this achievement then you are good to go and will begin earning twitch drops randomly on watching WoWS Streams.
Fem,
The answer is in my quote:
The Twitch Port, was a limited time promotion tied to a Twitch Prime promotion in March 2018. It is not currently available and is not granted from linking your account.
You had to claim it during the promotion in 2018, it is not available for receiving anymore.
Fem,
devtrackers.gg