I sell digitaly items on ebay and I send them to my customer via email.Ebay sometimes removed items(MC999 eBay Listing Removed) .They warrned me that They can .."limits on account privileges and account suspension." I ve got 4 times this message-MC999 eBay Listing Removed.

How many times They may warrning me to restrict me?or What should i do to avoid this ?