Where does that line appear?
It appears under the registration and login page. I found in the meantime in which file it is. You can delete this line in the last paragraph of wp-members-dialogs.
After reviewing the verbage of this referenced code, I believe Chad meant for this URL to remain. So, I decided not to remove it.
However, it would be nice Chad if the default link is spruced up a bit (i.e. it be a smaller font and perhaps a modern logo added or something to that effect.
Just my 2-cents here.
According to the Plugin Directory restrictions, a plugin hosted on here “must not embed external links on the public site (like a “powered by” link) without explicitly asking the user’s permission”.
http://ww.wp.xz.cn/extend/plugins/about/
Most plugin authors handle this by prodiving a checkbox in the plugin settings, which is off by default. Users can tick the box to turn the “Powered by” link on if they want to support the plugin author & show it.
For wp-members version 2.8.1, you can go to line 652 in wp-members\wp-members-dialogs.php and change $show_attribution = true; to $show_attribution = false; at its first initialization before if condition. I will hide ‘Powered by WP-Members’ text on all forms and pages.
Another alternative is to just comment the line 494,
//$form = $form . wpmem_inc_attribution();
in the same file.