[E. Pluribus Unum]

I buy all my shaving supplies from Dollar Tree.

I can shave for a year for under $10, including shaving cream.

And Gillette doesn’t get a penny of it.

[The Truth Will Make You Free]

To have an impacts, it's time to stop using ALL P&G products. Gillette is just a blip on their portfolio. Here's a list at Wikipedia. Just a few of their brands are:
Crest
Oral-B
Pampers
Tide, Bold, Cheer, Downy, Gain
Dawn
Joy