The only "fanny" that I am familiar with is the one that ladies have. Baring that in mind, paired with the ".org" extension ...it is the "fanny organisation" (lol)
The ".com" of this domain fetched $12,500. Putting my crude impressions of it aside, if this is related to "fans of things" ...I would much prefer it is as just "fany". I don't see the connection with affiliate marketing, as much
If you have development ideas that are suitable, I encourage you to do that. If you received an offer in the hundreds, for the domain itself, I would consider that