Elon Musk tried to rebrand PayPal as X.com. Some thought it was a porn site.
Elon Musk yearned for a technological overhaul of the company that ran PayPal, and he wanted that change to start with the letter X - even if some thought it reminded them of pornography. In 2000, Musk had become CEO after the merger of his X.com and Confinity, the venture-backed company co-founded by Peter Thiel that owned the PayPal program that was a more popular money-transfer service than the one offered by Musk. After Thiel resigned following a rift over Musk pushing for the PayPal system
Source: yahoo.com