I don't think she'll have donated a penny, personally. She'd have been screaming from the rooftops about it if she had instead of refusing to confirm if she actually paid for anything herself when she was asked if it was sponsored.
I expect she'll have contacted the museum, talked up how she has 700,000 subscribers, is SOCH A HYOOJ AMMILY DICKINSON FAN and would love to visit and see everything the museum has to offer to show it to her huge following. They said yes and she got free VIP tours and $200 writing experience perks in exchange for advertising the museum. It was just an undeclared ad dressed up as a job and another opportunity she earned through privilege.
The only thing she'll have paid for herself would be flights and accommodation. That's another benefit of her privileged circumstances - the average person would never have a spare 2 weeks and £3,000 to blow on a museum visit to pad their CV. Plus she will have undoubtedly claimed back her flights and accommodation as business expenses since they were for "YEECHEEB WAAHRK".
It's also no coincidence that with anything she's ever done that she's ever claimed was work (Pumpkin Bread Activity, the museum thing, her teaching job, her JHAUN JAHRMAYNN transcription internship, etc.), she's been extremely cagey, avoided saying what she actually did, embellished wildly about the nature of her role and how involved she was or just outright lied about it.
She's never done even half a day's work in her entire life, but her CV says she's a CEO, teacher, researcher, voice actor, charity ambassador, social media strategist, lion tamer, deep-sea diver, the third person into space (when she was TWALVE!), inventor of the candle snuffer, first person to colonise Australia (WHAN SHE WAS TWALVE), founder of Unicef, winner of the Nobel Peace Prize (AT TWALVE!!!), 17-time Poet Laureate, Emily Dickinson's ghost writer, recipient of the Victoria Cross for outstanding valour in combat, and god knows what else. It's all just fake jobs, sham vanity gigs created by her management or woefully low-effort, unimpressive projects that she's embellished beyond reality.