I’m doing a charity ride later this year, I’ve done one every year since I started riding a bike. But I voted ‘no’ because, frankly, I don’t know you people, I would not like to see it, and I feel like this is not the place. I will raise funds like crazy in other venues, with people I know and can talk to about why it should matter to them and why existing funding isn’t enough… but I try to be sensitive to the medium, the context of the communication, and when it’s fine to ask and when it isn’t.
If you get to know someone on this forum enough that you’re riding with them, talk to them about your fundraising efforts. Otherwise, it will only be so much noise, and aside from not contributing to this forum it will get lost in the noise of everyone, everywhere, who is also raising funds for a charity ride.