Don’t know what the exact cause was/is for this big surge - but I am glad to see it. No matter what personal problems people may have with the main devs, they are doing great work on the platform.
Also of interest, since this is a good place to plug things, other threadiverse things:
And I couldn’t find a way to donate to mbin, in lieu of that:
https://docs.joinmbin.org/contributing/
EDIT: The creator of mbin gave a link in the comments: https://melroy.org/donate.html
If it’s any consolation, the admins of .ml will likely indefinitely host .ml with or without the support of patrons funding the development of Lemmy. Your support or lack thereof will never affect its operation.