Although I'm not a Buddhist, I worship the Buddha when I meet him and throw the coins in the merit box in front of him. Can buddhas and bodhisattvas remember my merits and bless me?

Sure! Even if you don't put coins in the merit box, you will worship the bodhisattva when you see it. He will bless you too!

Actually, the Bodhisattva is not a human being. He doesn't need RMB, and he won't bless you more because of your Dobusch, but he won't bless you if you give less. Bodhisattva is merciful, as long as you are sincere, Bodhisattva can see it!