Would beg to differ, the restriction is on buying/gifting/sharing not being gifted/shared to (i.e. being a receiver). There are reports on FT on successfully receiving and indeed since the US have themselves tweated that an account less than 12 days can be shared to.I agree. The 12 day rule was quite clear.
https://twitter.com/USAirways/status/386120021266538497
THe receiver of the tweat has also confirm this worked Ok for him.
Having said that clearly experiences differ.