Blindly investing in something just because a celebrity endorses it is a good way to lose your money. Manny Pacquiao and many others would advertise anything as long as the money is good enough so I would be careful trusting him or anyone else. Many celebs including Mayweather and Paris Hilton have already backed scams and that's why scammers often use them because it's good promotion and many celebs are happy to advertise anything as long as they get paid to do so.
Got your point but Manny's charisma to the Filipinos is different from that of Mayweather to the Americans. Manny had a dozen of endorsement deals here in the Philippines in fact you can see it in his trunk when he fights. If scammers are using Manny as a tool for their scamming activity then there goes our money in the drain.
Would you suck Manny's dick if he told you it was a good idea?
I would not, but he can have a handful if he says so. Sounds funny but this only shows how charismatic Manny is to his followers. He would not be a senator for nothing.