MilesBuzz! - OnePass Mile Pass

Continental is running this promotion where you can transfer OnePass miles between accounts. However, you need to pay a fee of $7.50 for every 500 chunk of miles transferred. My sister has offered me her 15,500 miles but I'd have to fork over $232.50 for the priviledge. Are these promotions worth it?
That would put me over 50,000 miles and in theory mean a free trip to Europe.

Are these promotions worth it?

no. there are cheaper ways to get continental miles (i.e., privilege pack). search the continental forum.

plus, they are running a "promotion," i believe. for a limited time, i think its $5 per 500 instead of $7.50.