You're right, but you'd need a plugin template tag that does not print output, something like
PHP Code:
sharethis('echo=0');
A quick look revealed that share this may not have this. In that case you could try, in bfa_postinfo.php
PHP Code:
if (strpos($postinfo_string,'%share-this')!==false) {
######## SHARE THIS ########
if (function_exists('akst_share_link')) {
ob_start();
SHARE_THIS_TEMPLATE_TAGE_HERE
$share_this = ob_get_contents();
ob_end_clean();
} else { $share_this = ""; }
}
Then you
should have the share this output inside $share_this and could, still in bfa_postinfo.php, (at the bottom where all the other replacements happen):
PHP Code:
$postinfo = str_replace("%share-this%", $share_this, $postinfo);
And then add it as option to bfa_theme_options.php
I have not tried this. If you want to try this, please let me know if it worked.