Builder pastes don't currently work without JavaScript access. If you're worried about privacy and security on this page, I suggest you look into the NoScript extension and a competent ad-blocker. Bundles collects no personally-identifiable information by default, and actively works to ensure your privacy and safety. Bundles is entirely open-source, you can view the source here.
Builder pastes are rendered on the client using Preact, a very small (<3kb) React renderer. Bundles loads very few assets to display this page, so there should not be a bandwidth concern when viewing this page.
Please try again after enabling JavaScript.
bundles - Markdown Delivery Service