[rsync]

Yep. Chicken and egg problem.

The idea is that they come into such broad usage that everyone just knows what an 0x code is.

[jacobsimon]

Or make your SEO good so that when people inevitably Google search, your result is first.

[danbulant]

0xSOMETHING is just a single word so that will usually not find something unless they have an index with all the generated codes, which is something they probably don't want.