I made my farm level stapler and my site level staple features, for SPSPER#0 it fires on MySite creation, so I presumed SPSMSITEHOST#0 would be MyContent, but nothing gets fires at all.
I set the stapler for both templates to be sure but it only activates on SPSPER#0 on MySite and only updates the master page on MySite.
This is the first time we have had a client who wanted MyContent branding so we just aren't sure if we have the right template