If I remember correctly wiredinvestors.com used to buy majority and keep the owner as operator with equity.
Kevin from Epic Gardening did take investment to grow?
https://www.businesswire.com/news/home/20220125005554/en/Epic-Gardening-Announces-17.5-Million-in-Financing-From-TCG
1. Here you can see where it is at according to the main registry:
https://www.internic.net/403/302/whois.html
2. My guess is that the old registrar is not up to date with the situation - you can contact their support and inform that the domain has been transferred away to another registrar...
I wouldn't do it on the sub domain, since you are looking to move away from the current setup.
How large is the site - how many pages?
Get a new domain and host it somewhere else or other option would be to do the dev on local install of WP.
Could you add MailGun with aliases and rules in front of the Mailparser to solve unique email addresses cost problem? (or perhaps replace the Mailparser with MailGun?)
That Reddit posts seems to be accessible via Google cache and same/similar post alive on the /r/bigseo
https://www.reddit.com/r/bigseo/comments/70v21d/serpstat_allinone_seo_tool_running_lifetime_deal/
Noticed this
https://www.reddit.com/r/juststart/comments/70ssbw/serpstat_allinseo_tool_running_a_lifetime_deal/
(might be useful for those that upgraded and destroyed their lifetime subscription)
What I meant is - keep using your current domain, but change the file name of the article and update your internal links to point to the new URL of the article.
or you could test if ...
1 D) moving the money page content to new a URL. And then create useful info content that gets links and add internal links to the money pages that are on new URLs.
Wouldn't Cloudflare free plan with sub domain for the static be all you need - plus you get the kickass DNS for your domain?
https://www.cloudflare.com/plans/