[tommybaz]

Just in case it matters i have used this code in my bp-custom.php to add the featured image to activity stream:

<?php

function record_cpt_activity_content_featured_image( $cpt ) {

    if ( 'new_business' === $cpt['type'] ) {

        global $wpdb, $post, $bp;
        $theimg = wp_get_attachment_image_src(  get_post_thumbnail_id( bp_get_activity_secondary_item_id() ), 'large' );
        $cpt['content'] .= '<img src="' . $theimg[0] . '">';
    }

    return $cpt;
}
add_filter('bp_before_activity_add_parse_args', 'record_cpt_activity_content_featured_image');