How do I know if a Wordpress theme supports a subscribe option?
Um, not sure pal! You see we made this website with Weebly not Wordpress. Although we do have a Wordpress account. I will look into this and try to find out for you though. We hope you liked this site!
P.S. I checked out your website and it says its in Polish; well about that: I come from the UK so this reply might not be in your language, if so just use Google Translate and everything should appear in your language!