This template is not blank, it adds a little icon in the top-right corner. See?

Place {{HotCat topicon}} anywhere on your user page.

This icon is based on {{topicon}}

{{HotCat topicon
| icon_nr      = the icon number determines the offset of the topicon
| extra_offset = an additional offset that you can use to force or adapt (in case you have non-20px wide elements in your topicon row)
}}