"There are a lot of Tongans in the current team and Samoans and they know what it is like. They know it is all about the families and the culture. I don't gain anything from going back - we don't get paid a lot of money or anything.
"But I am going for the right reason, to give back, and I think those guys are happy for me."
Fekitoa said players who made the switch could have long, rejuvenated careers on the international stage.
"I wanted to come out and lead the way, so hopefully they follow that," he said. "I understand some guys are Kiwi at heart, or Australian born and raised, but if you haven't played 100 games, why don't you switch. Especially some very talented guys under 30.
"It's okay to play for tier two nations and it's okay to change. You can use your talent when you are still young.
"You are under 30, you have still got ten years left in the game and you can use that to inspire another generation."
Fekitoa played for Tonga in the Wellington Sevens at the age of 16, while he was attending Wesley College.
The so-called Olympics loophole allowed Fekitoa to play for Tonga at the Monaco sevens. His test comeback was delayed until next year because of injury.
Fekitoa said: "After all these years it felt the same. The whole place, how they treated us, the whole environment.
"It is still the Tonga boys. Island guys, laid back, some of them never on time. The feeling was the same but for myself, I feel a lot of responsibilities now."