How Ghanaian are Ghanaian websites?

In the last post ( or so) some mention was made of the e zwich system. More information on the system is available at http://e-zwich.com

But this is not the import of this post for now. I was rather hoping the website for such a Ghanaian innovation would be on a domain like e-zwich.com.gh - never mind if e-zwich sounds more German than Ghanaian.
This pricked me to take a casual look at a few 'Ghanaian sites' and it didn't take me long to notice quite a few. The majority of the sites representing Ghana in one way or the other do not reflect so in their domain names. For examples the sites mentioned below, I thought, should have .gh at their end;

www.gbcghana.com
www.ghanafa.org
www.tamaletoday.com
www.agricbank.com
www.prempeh.or
www.opokuwareschool.org
www.ghanaweb.com

Is it extremely difficult to purchase Ghanaian domains or what? So far it appears only the 'big organisations' have managed to get .gh in their domains.

Can someone educate me on this?

In other countries even small scale businesses have "national ID" in their domain names. What is the thing preventing us from doing same.
Once again; Can someone educate me on this?

Please post a response if you have one