question

I was wondering, is it ever a plus ev move to rebuy or add on in a freeroll?

One of my local card rooms has a 1K or 2K freeroll once a week. You get 2500 or 3K and 15 min blinds 10 handed. You can add on or rebuy at the beginning of game 10K for $10 unlimited add on's or rebuys. I usually buy 50K for $50 at the beginning. If I do not do this by the 3rd or 4th level I have less than 10 bigs unless I get REAL lucky. This game like most freerolls have a very fast structure and the rebuy or add on's are a must to have any chance at all I feel.