Should I use the plural or singular form of "reward"?

[Marianna]

A bonus reward for matches will be doubled.

Bonus rewards for matches will be doubled.

I receive a different amount of bonuses after each match in an online game. On the one hand, "bonus reward" is a reward type, and I always get the same thing - bonuses (not different types of rewards). On the other hand, I get this reward for each match, so the plural seems appropriate too. Should I use "reward" or "rewards" here? Could you please clarify this to me?

[Alan]

#2 (as you have said, different amounts for different matches).