I just completed the following transactions...
I bought 50k+50k bonus = 100k for $1375
My partner did the same = 100k for $1375
($.01374 per mile for a total of $2750 for 200k for us in 2 accounts or 100k each account)
Shared 50k, so -50k + 50k = 50k for $567.50
My partner did the same = 50k for $567.50
($.01294 per mile for a total of $1135 for 100k for us in 2 accounts or 50k in each account)
Sharing is the better way for sure but you need to get multiple people involved. Too complicated for me.
Each of us gained 150k in our accounts for a total of $1942.50. That should net us a Business Class ticket to Asia or Africa with points to spare so I think I'm going to stop here and not use the remaining "gift" miles. Don't need that many miles laying around in my account when I think about the cash outlay.
Also, I tested the system to see what would happen if I tried to share again and I got the following message...
The bonus limit for this promotion is 50,000 miles. Your recipient has already received 50,000 miles, therefore your bonus for this transaction is capped at 0 miles.