Originally Posted by wanderlust_jules

That seems ludicrous that BA says it will only give you 25% credit. Maybe you need to talk to another customer service person at BA (although their CS can be crummy). I have FF with BA and have received full credit on discounted tickets while traveling on their partner airlines. While traveling around OZ I got full BA mile credit from flying Qantas and I had a multi-destination discounted ticket purchased through a broker (one-way tickets patched together) as well as received full credit flying on Iberia. My rule of thumb is go with the larger carrier or the one you are most likely to fly in the future. I also have FF with UA's mileage plus and have gotten full credit on partner airlines, no prob. And if I encounter ANY travel issues along the way I write a letter of complaint to the airline and in the past have gotten 125% credit for my troubles, nice upgrades, generous vouchers—all on discounted tickets. And with that RTW ticket you are likely to hit some rough spots (I had a very nasty experience with Qantas at the Ayer's Rock airport). Good luck and happy flying!