Per the FAQ on ESO: Tamriel Unlimited...
"As a current subscriber: If you are an active subscriber when The Elder Scrolls Online: Tamriel Unlimited launches, you will receive 500 crowns for having a game account, plus 100 crowns for each 30-day period you have been an active subscriber. In addition, you'll be automatically enrolled in ESO Plus for the remainder of your subscription period."
Background: When the 3 & 6 month loyalty rewards came out, I had to wait an extra month because I had pre-ordered the Imperial Edition and received the 5-day early access. Early access was very buggy and we were given 5 "sorry about that" days (on 05\02\2014) free to make up for it. As a result, people who started playing on day 1 of the release (not early access), were considered "subscribed" longer than us because the extra 5 days we received did not count towards our subscription time. This put me past the cutoff date for the 3 & 6 month loyalty gifts by 1(!!!) day making me wait until the next month before I got my reward items.
To my questions: Is this going to happen the same way for my Crowns? Are we (early access people) going to get 100 fewer Crowns because ZOS gave us extra days at launch, even though we've been playing since early release and before the official launch date? How are you calculating each "30-day period you have been an active subscriber"?