KV. and anyone else interested, I contacted IAS, and they will indeed accept bets at Top Fluctuation with a minimum price stipulation, great stuff if you're betting ratings (or anything else) to prices.

Just for the uninitiated this means that you could place a bet something like this: (example only)

Saturday 17th PR-5-3 Scenic Assault $100 to win at Top Fluc, (minimum price accepted =$1.80)

So you were on as the top Fluc was $3 (win or lose of course)

If the Top Fluc had been say $1.75, your bet would ahave been void, (win or lose)