Unless these packs were advertised as part of the package you paid for, this may be considered in a bad light.
The wording makes it clear - this is a workaround for those who purchased the game but had trouble retrieving the included DLC, (ordinarily unlocked via code), via the launcher.
I would strongly suggest you think seriously about the wording in both the DLC notification and the mail:
provided to you as a bonus when you purchased the game. rustypup:
They just removed DRM and have given a straight forward method of install ALL DLC. Personally I don't think they care at this point; they did announce all DLC will be free anyway, and they are also aware that pirated copies get all DLC, and their ethos is "the customer should get superior advantages"...so honestly, just stop worrying and start playing