Hi,
The main problem is that since it’s imposibble to re-create a contact, the emailContact() won’t work.
e.g. if a buyer is purchasing a product, he can get an email, but the supplier can’t.
The API says that createContact() is for add/update, but actually it’s only for add.
The createContact() issue doesn’t allow to add labels after 1st registration to CRM.
Thanks!