Bookmaker opportunity

A certain bookmaker is offering $300 non-withdrawable bonus to be turned over ten times on odds >2.99 before withdrawal. Problem is their odds are too low to value bet the bonus until turnover as since I started VB no bets have popped up for this bookmaker. Matched betting might not be an option either because I do not want to risk getting my actual funds tied in an account I have to turnover ten times. Are there any staking strategies that can enable one turnover such a bonus while loosing the least amount of it?

I would stick with Max 0.5%-1% and 20-30% Kelly. Other solution might Be odds staking ladder type of betting. But most likely you have timelimit on bonus which does not give you toi much wiggle Roome to lower volatility

lexington23 - what bookmaker are you talking abou ?