Question:
When it comes to giving matanos to goyim, is it enough to have a personal benefit to dispel the issur of lo sechaneim even if one's main intention is to help the goy?
Answer:
The point is that it isn’t chinam- free, but there is a personal gain from it as well. This is the general rule. If you have specific case that you want t discuss let me know.
Sources:
CH:M 247-2, SM:A -2.