I'm not bothered by Nabble's logo on my site. But then I
want my site to look folksy and small time. My market is mature gardeners who are typically alienated by the slick, clinical, generic look of the big gardening forum sites, polluted by Google ads.
Idea: charge a fee that (a) provides for ad removal and (b) is linked to the numbers of forums in use per user plus forum storage capacity. Yola charges $19.95pa for sites in excess of five and throws in almost infinite storage capacity. But as you can put up no fewer than five Yola sites each of 5gb storage size for free, anyway, there's no incentive to pay them.
I'm sure I'm not alone among Nabble users in
wanting to pay a (modest) fee. I've always distrusted altruism