The Archive Team "only" organises the scrapping as far as I'm aware (volunteers run some servers, write code to scrap the service, etc) and then other volunteers run the VMs that do the scrapping. Then they upload the content to the Internet Archive and this imgur backup will end up on the IA's Wayback Machine.
According to the project tracker[0], 4TB or 3.55M items have been saved so far (15 hours), over 40M in waiting, but according to their IRC[1] more URLs will be added later.
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[0] https://tracker.archiveteam.org/imgur/
[1] https://webirc.hackint.org/#irc://irc.hackint.org/imgone
The solution is to pay for the storage you are using and store files on your own domain, one that you are willing to pay for a lifetime and/or even have a contract with relatives to maintain it if you want that content to survive you.
I have an imgur account, and I have uploaded some images as anonymous as well. I've always treated those as throwable content. I would never publish anything that I deem permanent in a third party server or gloud service.
Cool URIs don't change: https://www.w3.org/Provider/Style/URI
What are the odds that archiveteam.org can make it work? The continual desire to censor naked pics on the internet so replicates the behavior of various idiots censoring literature and art over the ages.