I finally got some answers relating to the 20% off limit.
- Even if you returned a game, it does count towards the 20% off limit.
- The limit does not reset, it is currently considered lifetime.
- Games that are part of order cancellations do not count toward the limit.
- If you would like to purchase more than 3 games of the same title, it is recommended to not link it with your My Best Buy account.
http://forums.bestbuy.com/t5/My-Best-Buy-Gamers-Club/For-the-20-discount-on-new-games-is-the-3-limit-per-title-a/m-p/767941/highlight/true#M13507
The information as we have it is that there is a limit of three games of the same title, regardless of platform. There is no expiration date on that restriction, aside from your Unlocked expiration date. If you would like to purchase more than 3 new copies of any one game, I would recommend you do not attach the purchases in excess of 3 to your My Best Buy account, to ensure you are in compliance with this rule.
As a reminder, Unlocked customers also get 10% off used games, and those would not count towards your new purchases.
http://forums.bestbuy.com/t5/My-Best-Buy-Gamers-Club/20-off-Unlocked-Discount-Limit-3-Question/m-p/768099/highlight/true#M13521
Thank you for being an Unlocked member. You can rest assured that order cancellations will not be counted against your 3 title limit. Returns may be, however, as they are the result of a completed transaction either online or in-store prior to the return.
While the rules may be amended in the future, at this time there is no reset date on when those 3 games can be purchased. As long as you are eligible to receive a 20% discount on new games, it is expected that you can purchase up to 3 copies of any one game.
Used games would not count toward this limit, as they have their own 10% discount wholly separate from the new game bonus.
I have reviewed the Disney Infinity Power Disc packs with the My Best Buy team to gain clarification on those items, as they are one SKU for packs with randomized discs inside. I have learned that while the 20% discount and limitation rules are specifically referring to new game titles (i.e. Battlefield 4, Ryse) it may be made available to physical game add-ons such as the Power Discs. While this is not a guarantee that all add-ons are eligible for the discount, those to which it is provided will not be looked at for the purpose of the 3 title limit. Go Power Disc crazy!