I dont get your point. If someone deposits 5 btc, u'll give him 1.5 btc for free?
We'll match the deposit, 5btc. You need to place bets with odds of 1.50 or greater, 15x the deposit, eg 5 x 15 = 75btcs in bet turnover.
(in most soccer games in odds >2.5 0.03BTC).