After 22 years, the Israel Internet Society changed its rules and allows current owners of one-letter domains to transfer ownership. Sale for financial reasons.
How is it monetized?
Not monetized, but it has great marketing potential for many areas.
Does this site come with any social media account?
How long does this site take to work?
What challenges are there with the execution of this site?
There are no challenges. The new owner would change the content and purpose of the site.