Thanks, I am the dev who put it together. Has been quite the ride so far, going from zero to several million requests per day has been... interesting :-)

I don't know how incomplete the search results are but for most sites this should be enough to give a relative idea of the popularity of their posts. And in any case, I only built it in this way because this was the way Twitter suggested for getting information about links in the announcement they made about shutting down the share counter.