Despite what you do to improve traffic to your sites, your stats tracking software consistently shows close to zero traffic. Demoralizing you say, I agree. To lift your spirit, go and look up your awstats and webalizer program from your cpanel. You will always see encouraging traffic all these times, despite whatever stats tracking software you are running in your site.
When your wordpress starts giving out 500 internal errors intermittently or consistently, check your process table from your cpanel. Chances are, there are too many wp-cron.php hanging and clogged up your limited process table (as allowed by your hosts).
What's causing these wp-cron.php to hang? You may ask. First suspect, is your list of Update services, i.e. the list of ping servers under your setting->writing module. No sure of the exact relationship, but when I get rid of the existing list of update services servers, my list of wp-cron.php also went away. Seem like a good place to start my troubleshoot from there.
Hope it helps you as it certainly helps me 
