Facebook first pulled and then later restored ads by Democratic presidential hopeful Senator Elizabeth Warren on Monday March 11th calling for tech giants to be broken up.
"We removed the ads because they violated our policies against use of our corporate logo," Facebook told AFP, adding, "In the interest of allowing robust debate, we are restoring the ads."
It put the number of affected ads at four.
However, other ads calling for the breakup of Facebook and other US tech giants ran as intended, according to the California-based social network.
"Curious why I think FB has too much power?" Warren said in a message posted on Twitter.
"Let's start with their ability to shut down a debate over whether FB has too much power."
Later, Warren went on to thank Facebook for restoring her ads and called for a "social media marketplace that isn't dominated by a single censor."
She revealed a proposal just a few days earlier to break up Big Tech, saying that firms such as Amazon, Google, and Facebook hold " too much power" in society.
Warren said that as president, she would press for legislation to designate big online companies with revenues of at least $25 billion as "platform utilities" barred from owning "any participants on that platform."