Also his personal homepage (https://andrewjdillon.com/) seems to be no longer under his control, the certificate has a different CN and the websites domain is listed under the SAN (with a multitude of other domains).
There appears to be no obvious plausible link between the SANs other than very obvious lack of plausibility to each website. They're mostly pretend (or knock-off) business websites in random countries (everywhere from Trinidad and Tobago, Germany, mainland USA, Hawaii...) in various languages and all the ones I checked have no verifiable substance to them. For example, one domain is a supposed USA shipping/logistics company whose website states they have 1949 customers and have only delivered 7126 packages, and claims a head office as a house in Renton WA, an office at a different house in Stockbridge GA and a supposed warehouse at a third house in Portland OR. Most domains don't include any valid contact or business information, even a supposed restaurant where you'd want people to find your location easily!
There does appear to be heavy use of Google Firebase, and many of the sites share the same IP address(es) for hosting. A reverse IP lookup of domains hosted at those IP addresses reveals more random suspicious domains beyond just those just listed at https://crt.sh/?q=andrewjdillon.com
Last account activity to contribute to any to any repository was 2021-11-28 to comment on the hopding/pdf-lib repository.[2]
It's clearly now an unmaintained repository with 4+ years of inactivity, and likely now also a mostly unused GitHub account in general.
[1] https://github.com/Hopding/andrewjdillon.com/commit/0657c690...
[2] https://play.clickhouse.com/play?user=play#U0VMRUNUICogRlJPT...
When the linkedin is down, medium is left unattended, the personal domain is not working, we can reasonably guess he doesn't (or is unable to) care about the project or online presence anymore.
Go clone the repo and work on it.
