BuddyPress.org

You can try this …

function add_text_to_members_page() {
    echo 'This is my text intro etc.';
}
add_action( 'bp_before_directory_members', 'add_text_to_members_page' );

Easiest is to use the Code Snippets plugin. Download it from the wordpress plugins site. I can’t link to it because this fu***** sh** website holds my comment for moderation when I link to the Official wordpress website. Go figure.

And re. number of members to show per page, try this …
(You can change the “100” to anything you like.)

add_filter( 'bp_after_has_members_parse_args', 'show_more_members' );

function show_more_members( $args ) {
	if ( bp_is_members_directory() ) {
		$args['per_page'] = 100;
	}
	return $args;
}