Please stop auto-enabling the "subscription" checkbox on the payment page Follow

Don't default it to enabled like you're currently doing, especially for a user with a history of opting out from the subscription.
It feels like you're trying to trick me into subscribing - If I had accidentally subscribed, I'd be annoyed.

Just so we're clear - I'm entirely fine with the price.

I've been paying for IDEA for a long time. I think it's a great product  -   actually, I think the "/3rd yr onwards" tier is a little bit too cheap.