How much is one account? I don't think I will have enough money. I just faucet money. I not going buy bitcoin because it is not stable. Can I get a free sr.member account first and pay later?
How much is one mBTC? What is martingale?
Depends on seller who sell the account(and depends to account too). Im not sure someone will give you free account then pay later.
0.00100000
BTC = 1 mBTC (millibitcoin). More info about converting:
https://bitcointalk.org/index.php?topic=574960.0Martingale = a gambling system of continually doubling the stakes in the hope of an eventual win that must yield a net profit. CMIIW
~iki