McAfee researchers have been tracking a trend whereby spammers use the top-level domain names of small islands as website links in spam campaigns to circumvent spam filters that traditionally catch more well-known domains. The practice was first discovered when McAfee researchers noticed a significant increase in the use of .st domains, the TLD for Sao Tome and Principe.

Some of the other small islands McAfee has identified as favoured by spammers include .tk (Tokelau), .cc (Cocos Islands), .tv (Tuvalu), .as (American Samoa), .im (Isle of Man) and .to (Tonga).