Correct version previous post:
i've got an idea for getting higher multiplier - you could add sth like daily challenge system - RANDOM girl want you to take her on RANDOM date, buy her RANDOM gift, and work RANDOM times at RANDOM work. If all succes you will gain 0.05 prestige per day, so you can steadly increase your multiplier. Challenge can be fail if you don't have specify work unlocked, but you can always try tommorow with new challenge :).
i've got an idea for getting higher multiplier - you could add sth like daily challenge system - girl want you to take her on date, buy her gift, and work times at work. If all succes you will gain 0.05 prestige per day, so you can steadly increase your multiplier. Challenge can be fail if you don't have specify work unlocked, but you can always try tommorow with new challenge :).