You'd still find something to fucking complain about.
If she'd donated £2000 it wouldn't be enough. They're millionaires you know....
If she'd donated £2 million... You'd be all like "ugh, read the roooooooom. You makee my £20 insignificant. There's a COL crisis, don't they realise it's just crass to be showing off????
The woman has done a fundraising walk which has done exactly what it needed to do. It was fine without fanfare and has hugely raised the profile of the charity she's choosing to support. She may or may not have privately donated....
What more do you want from her?