Meghan Markle saw just 200 people publicly share her birthday post 24 hours after putting out an appeal to fans, it has been claimed.
The Duchess of Sussex marked her 40th birthday with a social media post which included a poem and said it was her one wish to have it shared as much as possible.
The former Hollywood star, who stepped down as a senior royal along with husband Prince Harry last year, also released a comedy video as part of a launch for a new initiative called 40x40.
The clip sees mum-of-two Meghan ask celebrities including Adele and Stella McCartney, as well as the general public, to "help women reentering the workforce".
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A separate post on the Archewell website saw her ask fans to download and share the post - which included the hashtags #40x40 and #CompassionInAction - as a present for her landmark birthday.
It included a poem with the line: "For women who give everything, we give our time. Are you in?"
A suggested caption was even given, reading: "To celebrate The Duchess of Sussex’s 40th birthday, I am devoting 40 minutes of mentorship or service to a cause I care about.
"Please join me in donating your time. Together, we can contribute to a global wave of compassion and positive change."
However, according to analysis done by The Sun, a day after the video was released it had been publicly shared just 217 times.
This doesn't include Twitter shares or private shares on Instagram, or stories that had already vanished.
The Duchess explained the new initiative in a post.
It said: "In reflecting on my 40th birthday and the many things I am grateful for, I’m struck that time is among our most essential gifts.
"Time with our loved ones, time doing the things we love, time spent learning, laughing, growing, and the sacred time we have on this earth.
"Amongst the most valuable gifts of time is also time spent in service to others knowing that it can contribute to incredible change.
"To that last point, and with my 40th lap around the sun in mind, it made me wonder: what would happen if we all committed 40 minutes to helping someone else or to mentoring someone in need?
"And then what would happen if we asked our friends to do the same?"
She added in the video: "Over two million women in the US and tens of millions around the world have lost their jobs due to Covid.
"I think if we all do it and see all commit to some sort of act of service, we can have some type of ripple effect."
Meghan has asked 40 activists, athletes, artists and world leaders to participate.
She added: "I believe mentorship is one way to help women regain confidence and rebuild their economic strength.
"With this time, I hope they each help someone advance a professional life on her own terms and I hope that they inspire countless others to give 40 minutes of their time as well."