As far as I can tell, the plugin is free. It’s a Constant Contact account that you have to pay for, yes?
The plugin is free, Fast Secure Contact Form is free, and Constant Contact offers a free 60 day trial. I don’t see the problem.
@digihulpdienst Could you please reconsider your rating based on the plugin itself?
Constant Contact is still hiding that you have to pay after 60 days. So I think you should make that clear. To me (being not native english speaking) it still is not clear.
I’ve updated the plugin description to include Constant Contact is free for 60 days, after which time it is a paid service.