I work for a big company (Apple) but I have no idea who Frank is, nor how to sponsor them; and even if I knew them and how to sponsor them, the money would come directly from my pocket instead of Apple’s banking account.
Maybe you don't know this but Apple has a donation-matching program. If you make donations to non-profits through some special internal mechanism, the company will send a donation of equal value (up to some limit). If I recall correctly the limit is 30K USD per person.
From the article:
The "sponsoring it" links to https://opencollective.com/libsodium/contributeHope that helps.