I think, list of available inventions is secret?
yes, i will not reveal more

players probably will post pictures there, but i hope they will not reveal all of them

As a gamer, your players are going to totally share this information. You can switch it up though, changing whatever the invention 'specs' are after every week or so. Keep us on our toes. You could keep a few default ones.
I'm already selling wine! I got this gig figured out!
Edit: saw your reply, ya, you probably won't need to change it much (if at all).