In order to optimize API usage, Memberium lets you control which data you synchronize during login.
The Synchronize Tag Details option lets you enable or disable synchronizing the specifics of the contacts tag information during login. Synchronizing this data is useful if you want to make decisions based on not only whether or not a tag is assigned to a contact, but when the tag was assigned.
API Impact
Enabling this feaure will add 1 API call per every thousand tags the user has, every time the tags are resynchronized.