Counting the while result at Wordpress - wordpress

Question

I have this featured listing and the code needs to count how many active featured listings the user has. I can't make the while loop work here in Wordpress. Here's code I used:
global $paged, $wp_query, $wp;
$args = wp_parse_args($wp->matched_query);
$temp = $wp_query;
$wp_query= null;
$wp_query = new WP_Query();
$wp_query->query('post_type=post&posts_per_page=-1&author='.$user_ID);
$FeaturedAdsCount = 0;
while ($wp_query->have_posts()) : $wp_query->the_post();
$featured_post = "0";
$post_price_plan_activation_date = get_post_meta($post->ID, 'post_price_plan_activation_date', true);
$post_price_plan_expiration_date = get_post_meta($post->ID, 'post_price_plan_expiration_date', true);
$todayDate = strtotime(date('d/m/Y H:i:s'));
$expireDate = strtotime($post_price_plan_expiration_date);
if(!empty($post_price_plan_activation_date)) {
if(($todayDate < $expireDate) or empty($post_price_plan_expiration_date)) {
$featured_post = "1";
}
}
if($featured_post == "1") { $FeaturedAdsCount++; }
endwhile;
$wp_query = null; $wp_query = $temp;
echo $FeaturedAdsCount;
The output of $FeaturedAdsCount is always zero no matter if the user has active featured listing. Am I missing something here? Sorry I am still learning in PHP, self-taught actually. :) Thank you in advance!
PS: This is the postmeta table:

Answer 1

Okay! After hours of reading and googling, it says that when calling get_post_meta inside a loop, always use get_the_id() instead of $wp_query->post->ID or $post->ID. So the final get_post_meta must be like this to get a result inside a loop:
$post_price_plan_activation_date = get_post_meta(get_the_id(), 'post_price_plan_activation_date', true);
$post_price_plan_expiration_date = get_post_meta(get_the_id(), 'post_price_plan_expiration_date', true);
Thank you xphan for all the advice! :)