Email from backer:
I wanted to increase my subscription. The only way I could figure out how to do that was to cancel my existing one and start another one at the higher level. Was there a way to upgrade an existing subscription?
Response from Open Collective:
That’s right! for the moment the only way to update your subscription is to cancel the current one and subscribe again with a different amount.
I created a topic in our forum of How to cancel a subscription as a backer of a Collective?
Basically you just have to head to: www.opencollective.com/subscriptions and manage your subscriptions.