The point is, scripture says we must believe that God is a rewarder of those that seek Him. So when God speaks to us and says, "Give that guy over there $100. I know you need that $100 for your electric bill, but give it to him, and I'll make sure your electric bill is taken care of.", it is not wrong to *expect* God to fulfill that.
Motivation in our giving is very important. But what I see being suggested in this thread by some is that we should expect *nothing* for our giving. While this is true of my giving to
you, (i.e. if I give you something, I should expect nothing in return from
you), it is not at all true of our relationship with God. It is not wrong to *expect* that God will reward us, in innumerable ways, as we walk with Him and follow after His voice. In fact, Hebrews tells us that we MUST believe this. I MUST believe that as I am obedient to God in my giving, that He will reward that. That may well include a financial reward. It may be a deeper relationship with Him, or a greater revelation of His Love. Whatever that *reward* is, I MUST believe that by seeking God in my giving, He rewards that.