Your post(s) are a little difficult to understand but I’ll have a go. There is no strict rule anymore about removing the copyright but individual users and staff have the right not to give support for boards with the copyright removed. I personally think that the people giving you excellent software and many thousands of man hours for free should at least be given a little bit of credit, ie; the copyright. If you wish to have your copyright there is no issue just have it as well as not instead of.
If you want to dynamically change the date on your copyright you should make an extension request