Unfortunately, you can't. Luckily, these activities are optional; only the survey at the end of each campaign is mandatory. You just won't be eligible to win the prizes associated with the corresponding Badge.
However, we should note that part of being a successful Influenster is being active on popular social media channels. So, maybe you don't have a blog? Well, now is a great time to start one! You might find that you enjoy having a space to show the world your creativity.
Not on Twitter? Join the conversation! We're always gossiping about the latest products, fun facts, and pop culture. Make @Influenster the first brand you follow!