Today is the day when I reached 400 signups.
I realised that:
65% of people understand my native language (Slovak language)
Open rate of e-mail campaign (people who signed before beta was launched) - 65% (native language) vs. 12% (english language)
I got mostly people from specialised facebook groups. To be honest, people reacts positive on the demo.
I need to improve understanding of using my plugin in right way. There is hidden algorithm and it seems people need better explanation.