The best (cheapest) option to upgrade to any higher level is to
post a request for 'bulk DNF$' in the DNF$ section yourself,
asking for people to give you a great deal on DNF$ if you buy a ton of them at once!
Let them compete! :-D
Exactly one month ago, I needed DNF$ 33,333 and I think I paid about $166.66 (i.e. just $0.005 p/st) for them to a DNF member. Ideal!
