Originally Posted by
MSPeconomist
With a different airline, sure, but buying AAA-BBB-AAA RT and nesting within it lots of BBB-AAA-BBB RTs purchased at the same time would cause trouble with some FF programs, especially if the purpose was to avoid paying more because of minimum stay requirements.
OP stated that he would buy a single ticket AAA-BBB (single means one way) to start. There is no nesting.