Not putting the price on the website is a turn off for me. I don't want to explore a tool without knowing how much it will cost me before hand.
So please make the commercial option more visible and transparent -- without people having to email you.
Since you explicitly mention Sublime Text: their pricing is listed on their website and they have a clear 'Buy' button. Not sure why you would share that your pricing is similar and name a specific product, but also appear unwilling to display what the pricing and featureset is.
I found two competitors, signed up to both with Gmail and paying for one. Not my loss, doesn’t bother me.
What is the logic behind all these stupid rules? Money is money, customer is a customer whether they have gmail or some other fancy email, right?