Oh my god, I didn’t know there was this checked by default in Transifex user settings!
Are they crazy defaulting such privacy breach to yes?!
I uncheck it right away but am wondering where my email has already appeared for years.
I logged in with GitHub, thinking I would avoid most hassle by not creating real account.
But Transifex… displays my email address by default!? Wow! 
Boom!
I should not have gone there, I already found Transifex completely not convenient to manage translations, without knowing they would even do this to me…
Uupdate:
I have made a search and it seems my email was not published to those *.po files, hopefully!
Thanks @IvanDobsky for showing me this Transifex settings, anyway, to prevent my email being visible somewhere, starting from now!