I think the number is much higher if you consider all the people donating to their local server.
Plus your numbers seem off. For example, Librapay shows that there are currently over 300 people with weekly donations. Where are past or one time donors listed?
Patreon is paying out $2k a month, and has over 400 donors.
Your number seems much more like the number of regular donors rather than the total number of donors ever.
The links here are specifically the donation links to donate to the Lemmy devs. So even though they link to Open Collective, that's specifically the Lemmy dev one. There are others for other instances.
Sure, but the body of the post mentions donating to devs and instance owners. I'm being pedantic I know, but I think it would be a more informative post if it'd made clear what the donation numbers refer to and what they don't.
Yeah, that's the number of current donors with a regular donation. They have a goal of supporting 3 devs full time from regular donations, and this is showing their progress towards that goal.