15k miles isnt all that much in most OW programs. On AA, it will earn you a coach flight....almost. On BA, a coach flight...almost. QF, coach flight....almost. LA, not even close to a coach flight. IB, who the heck knows. AY, I can't read Hungarian. EI, are they still even in the alliance? JL, aren't they in the alliance yet?
I seriously hope that the gurus that be in the OW alliance have far more impt things to worry about then putting together what I think would be a pretty complicated system that would cross check every FF account in the oneworld alliance for those who *might* get more than one of the bonuii from PAYING MONEY to the individual carriers. It seems to me more that if they find out due to you being egregious then they will smack you on the nose with a newspaper and take them away. But who knows. Stranger things haven't not happened.