Let me know about pro, all task are restricted to pay , it's why? Is this not free forum to learn new things?

Answer 1

Secondly, Sololearn is a company. They need money to run it. While signing up, didn't you agree to their Terms of Service? It is clearly written that they have the right to decide what to make free and what not, not the users.

Answer 2

Hi! and what do you think, renting a server, developing a mobile app and website, constantly adding new training courses, translating them into at least two languages, Russian and Spanish, do not require payment?

Answer 3

Please here is just for quest programming