Free (Encrypted) Beta Key [Closed]

I've given away a few keys but thought for this one I would add a little hoop to give someone with bad timing on the forum refresh a better chance of getting it.

Here is an encrypted verison of a free beta key: 542MO-7W5FU-5DT4N-78AF4

I'll give you clues periodically until someone gets it right and activates it. If no one gets it within a couple of days I'll post the unencrypted key but I'm guessing people here will be smart enough to get it long before then.

Here are 2 clues to get you started (more to come later if needed):

1. 13
2. Alternating

Something a bit more broken down :),like 13 includes letters or without it

Another clue would be much appreciated.

Encrypted as in the numbers/letters need to be swapped or just encrypted as in hashes?

FML

Too many key attempts. Access has been temporarily disabled.

Lol i got the same thing too :P,still trying to figure out too many possiblities

2 More clues:

3. Add to first, Subtract from second, repeat (to encrypt!)
4. 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ

Can't even try cuz of disabled acc -_-

Disabled...

:( ,a little sooner could have helped cant try it now