Over/under 1.5 means that two or more of the selected events must happen in a match. In rugby, for example, you could wager on under 1.5 penalties. If one or less penalties happen, the bet wins. But if you bet on over 1.5, two or more penalties would have to occur.
The over 1.5 goals per game market might also be known as 2 and over. The reason for the addition of the half goal means you're not looking out for the 2 results of equal or over; you're matching 1 result where the goals are over 1.5.
A rollover is a multiple of a deposit that you must bet in order to cash out any winnings from that sportsbook. If you depositR$200 with a 10x rollover bonus, you need to makeR$2,000 worth of bets to ever see that money. It sounds harmless since you likely deposited at that sportsbook to bet, not win once and run.
