While purchasing credits directly was never allowed, developers included a secondary premium currency system :
: Use a Horizon Edition (HE) car equipped with a "Credit Boost" perk (such as the Dodge Viper SRT10 ACR or the Lamborghini Countach LP5000 ) to double your baseline race earnings . can you buy credits on forza horizon 3
: Before starting a long race, go to the Skill Shop and unlock both the triple XP perk and the double money perk . can you buy credits on forza horizon 3