After, this weekend, adding a paid subscription to my site to do nothing other than cover the hosting costs, I have another negative side effect to add to this thread:
Most will accept and understand the reasons for subscription.....
....however no matter how honest and open you are about the fact that subscriptions are absolutely voluntary and only exist to support and go towards the high costs of running a site, there will always be a small group of extremely vocal people who turn your honesty against you and openly accuse you of lieing, empire building and using the goodwill of the community to fund your next holiday.
I put them all into a "I don't want your support" user group that does not have access to the subscriptions.
I would like to be more explicit in my description of these people, but I don't want the vb.org mods banning me. So all I will say is:
:erm:*(&(*& &"?))" **

** "&"^?*** **

**
...and breath