First, our company won't be going under any time soon -- while 95% of the features are free, there are an extra 5% available to power users as part of our "pro" package for ~$4/month. We also sell domains. We're strongly profitable, so you don't have to worry about us going under :)

But should you choose, you can export your site as a .zip file and host it somewhere else.

Also, you can choose from either a .weebly.com subdomain or point either your domain.com or blog.domain.com to us -- in either case, we'll still host your site free of charge.