Allow paid accounts to become free accounts
I'd just like to suggest that you allow people who were on a paid plan to be able to switch to the free plan. I have very very very limited need for your service. so even though it's a great service, paying a monthly fee wouldn't make sense for me since I don't even login once a month usually.
The only way for me to use the free plan now (since i was a paid member before) is to sign up for another account. It seems pretty silly and wasteful to make people create multiple accounts. Just going to eat up more of your time since people will forget which account is what and either contact support for help finding their other account, or if they cant find their other account they'll just make even more accounts.