In just three days, more than 8,800 strangers have donated a total of more than $195,000. The campaign has been shared 68,000 times.
Macias originally only expected a handful of donations and was not prepared for the internet's overwhelming response.
"That one picture had so much to say, and people really responded to it," Macias told DNA Info.
"It communicated so many things — poverty, struggle, pride — it's like it spoke more words than any amount of writing could."
On Monday, Macias shared a Facebook Live showing Sanchez with his cart.
Co-owner of Paletas Poncho, Gustavo Gutierrez, tells Macias in the video that Sanchez has been selling their paletas for more than 20 years.
"Every summer he always comes back," Gutierrez says. "he's also really, really hardworking."
Gutierrez adds that Sanchez normally pushes a cart for a few hours each day, taking in about $60.
Sanchez says in another Facebook video he's "very grateful and very happy" for the kindness of strangers from all over the world.
In an interview posted to Facebook, he appears with his wife in Eladia and says he plans to continue working in the short-term.
A Pennsylvania company has now donated a solar-powered cart to make Sanchez's job easier, according to WGN-TV.
Donations will be open for several more days, until Macias disperses the funds later in the week, according to an update on the GoFundMe page.