Maybe it takes awhile; or more than 500 credits but the AI doesn't seem to respond to gifts of money. It would be fun when the AI is given money, it responds based on their liking of you.
Hate- Doesn't improve liking of you; might display "Now I can build the ship that kills you!"
Neutral- Improves relationship moderately, might accept it as a bribe if they are attacking you
Friendly- Doesn't improve it too much; but increases the chance they will accept to peace treaties/agreements
Love- Asks for marriage
Giving an ai too much money would make them suspicious of you, and more likely to backstab.
Would be interesting to see those implimented.