Or you'll run away with the 0.3 BTC as soon as it happens?
Which one would be more profitable for you?
I would imagine getting this 1 bitcoin "prize" and repaying this loan with a positive loan transaction would be the most "profitable" for me, in this situation.
Not from a purely monetary standpoint
You know, you really can just say nothing at all.
1. You sound as exasperated as someone who's had to deal with this before
2. Yeah, or I could do the moral thing and warn people of potential scams, since the moderators won't.