Why not make them like real life scratchers and people have a small chance of getting their money back.
if they match 1 or 2 then they get nothing. They have to at least get 3 of a kind to qualify for something.
3 cars and they get a free assault demon to be used in street assault
3 health bars and they get a free raid boss refill
3 bullets and they get a free stamina refill
3 lightning bars and they get a free energy refill
3 syringes and they get a free war health refill
If they get 4 of the above then they get two refills, 5 of the above gets five refills and for the jackpot 6 out of 6 give them 200 gold for hitting the jackpot.
Unlike the current prizes at least these can continue to be used no matter the stat inflation.