Individual Player Goal Minutes is based on the total minutes of all the goals scored by a single player in a match. So, if a player gets two goals in a match, one in the 17th minute and the other in the 53rd minute, the result would be 70 minutes (17 + 53). If that player fails to score throughout the match the result is 0 minutes.
SportsSpread may predict Goal Minutes for Ryan Giggs in a match of 18 - 31.
If you thought Giggs might not score at all in the game you would sell his goal minutes at 18. If Giggs had scored in the 3rd minute, you would have won 15 times your stake, in this case £/€1 per minute: (18 - 3) x your stake = 15 x £/€1 = £/€15. If, however, he scored in the 41st minute, you would have lost 23 times your stake: (18 - 41) x your stake = 23 x £/€1 = -£/€23.