As many people have mentioned in the past weeks, it is currently cheaper to purchase codeshare tickets through bmi on United metal rather than buying via .bomb. However, assuming I buy a flight on bmi, all of which operates on United metal, and the price drops, can I refare through United, or only through bmi (assuming they have a refare option...I haven't checked closely enough)?

Also, other then losing the mileage bonus on my flight, is there any reason not to buy through the bmi website? Will I be able to call United and still get economy plus seats? Will my dad be able to toss me an SWU if he feels like it?

I just want to make sure all my bases are covered before I pull the trigger on the fare...