::///::
Can anyone tell me how I can use this Bet Amount: 0.001 BTC

I never thought this question would come up; it’s like winning a car and asking, "So, how do I drive it?"

Aside from what was mentioned above (ico press) —and assuming you likely have no idea what your return will be (if you win, of course)—we always say on our local forum that the hard part is winning a free bet at G&R. However, there is also the step of "winning with it afterwards"; that shouldn't be difficult, yet the easiest objective often turns into the hardest one. Anyway, here is what else you need to know:
Free Bets
Freebet coupons are non-refundable.
Freebet stake not included in any winnings.
A Freebet coupon cannot be partially redeemed.
Freebet coupons are valid for maximum 30 days unless otherwise stated.
Freebet coupons cannot be redeemed on any other online product.
Any withdrawal prior to payout of Freebet payout will cancel the coupon.
All other site Terms and Conditions apply to Freebet coupons.
source:https://coinroyale.com/tos