$20… that’s how much I charge for one week trial. I’d never go under $100/month, I can see you mentioned different standards earlier, that doesn’t make a difference. $2000 might be a lot in Russia but it’s better to have 20 clients paying $100 than 200 clients paying $20. 20 clients is nothing, 3-4 of them will message you from time to time asking for tips and that’s it, you are basically doing nothing and making money.
Also those growth numbers are low, with old limits my clients were gaining 2000-5000 followers per month with f/unf only, no likes, comm. etc., you need to check your follow sources.
So to answer your primary question, NO, never lower the prices, just offer something more.