Actionbets is a good book. But I can tell you that their sister book ramjets who is offering the same promo, will use any excuse not to pay. So if you take the offer (not much reason not to take the fre money), be careful not to break any of the rules. The smallest infraction could cost you the account.
In the ramjet case, the player bet $5 in the morning on one team, and later he came back, and bet $5 on the opposing team by accident. The $10 in action had no ipact on the player completing the roll, but he did violate the rule of not ebtting both sides. So eventhough he completed the roll, the book used this as an excuse not to pay him his $100 in winnings.