public function tease_premium_views( $output ): string {
		// If ECP is installed, we don't need to tease.
		if ( defined( 'EVENTS_CALENDAR_PRO_FILE' ) ) {
			return $output;
		}

		// Honor the "hide upsells" functionality.
		if ( tec_should_hide_upsell() ) {
			return $output;
		}

		/* Translators: These View terms should match the ones in Events Calendar PRO. */
		$views = [
			'summary' => _x( 'Summary', 'Label for the Summary View checkbox.', 'the-events-calendar' ),
			'photo'   => _x( 'Photo', 'Label for the Photo View checkbox.', 'the-events-calendar' ),
			'week'    => _x( 'Week', 'Label for the Week View checkbox.', 'the-events-calendar' ),
			'map'     => _x( 'Map', 'Label for the Map View checkbox.', 'the-events-calendar' ),
		];

		$tooltip_label = _x( 'PRO', 'The label for the premium view indicator.', 'the-events-calendar' );
		$tooltip_title = _x(
			'Get Events Calendar Pro to use this View.',
			'The title (hover text) for the premium view indicator.',
			'the-events-calendar'
		);

		// Loop through the term array above and create teaser checkboxes.
		ob_start();

		foreach( $views as $name => $label ) { ?>
			<label title="Summary" class="tec-disabled">
				<input type="checkbox" name="tribeEnableViews[]" value="<?php echo esc_attr( $name ) ?>" disabled>
				<?php echo esc_attr( $label ) ?>
				<a
					href="https://evnt.is/1bb-"
					class="tec-settings-teaser-pill"
					title="<?php echo esc_attr( $tooltip_title ); ?>"
				><?php echo esc_html( $tooltip_label ); ?>
				</a>
			</label>
		<?php }

		$ecp_string = ob_get_clean();

		// Insert the teaser checkboxes.
		$pattern    = '/label><p/m';
		$subst      = 'label>' . $ecp_string . '<p';
		$output     = preg_replace($pattern, $subst, $output, 1);

		return $output;
	}