Hello there,
Thanks for contacting us! The sharing count for ShareThis buttons is tied to the URL of the page. This means that if the URL is changed, then the counts will reset. Changes to the URL can include:
Changing the URL to something new
Switching from one sub-domain to another
Changing SSL (eg, updating from http to https)
Including a re-direct on the URL
Implementing the st_url parameter on the button code with a different URL than the page URL
At this time, there is no way to transfer/export the stats between different URLs. The best work-around is to pass the original urls in “st_url” on new url pages to maintain the count on the original url.
For “st_url” property you can refer the below link –
https://support.sharethis.com/customer/portal/articles/475079-share-properties-and-sharing-custom-information
Best,
Brandon
ShareThis Support