the paid ad budget bleed
Performance agencies live and die by Return on Ad Spend (ROAS). When acquiring clicks at €3 to €12 each across Meta, Google Search, and LinkedIn, what happens in the first two seconds determines whether the campaign is profitable or underwater.
Most campaign landers are built on legacy visual builders—Unbounce, Instapage, or bloated WordPress installs. These platforms bundle megabytes of runtime JavaScript, jQuery dependencies, and un-optimized form libraries. Stack eight to fifteen analytics and tracking pixels on top, and mobile Largest Contentful Paint routinely exceeds 5.5 seconds on real cellular networks.
Before the headline appears, 35% to 45% of paid visitors have left. The agency still pays for those clicks.
edge delivery for campaign pages
Rally reimagines the campaign landing page as an edge-native static artifact.
Page markup, critical CSS, and above-the-fold media compile to pure static files distributed across Cloudflare’s global network of 330+ edge locations. Initial client JavaScript is exactly 0 KB. Interactive conversion elements—like multi-step qualification forms and ROI calculators—are isolated into lightweight Astro islands that hydrate only when visible.
The reference build records a 0.58-second mobile LCP. Visitors see the offer before the form and calculator islands hydrate.
15-minute variant velocity
The best-performing campaign is rarely the first draft. Winning at paid media requires relentless testing: different angles, new headlines, localized social proof, and altered form flows.
In traditional setups, launching a new variant requires either an agency webmaster submitting Jira tickets or a non-technical marketer wrestling with fragile visual builders that break responsive layouts.
With Rally’s Storyblok integration, media buyers assemble new landers by dragging pre-approved design-system blocks into place. Typography, spacing, mobile responsiveness, and brand tokens are strictly enforced by the component system—so pages look polished without designer intervention. New variants deploy in under fifteen minutes.
zero-flicker edge a/b routing
Traditional client-side A/B testing tools (e.g., Google Optimize, VWO) work by loading a heavy script that inspects the visitor and rewrites the DOM in real time. This introduces visible page flicker, degrades Cumulative Layout Shift (CLS), and slows down First Contentful Paint.
Rally handles variant routing directly in Cloudflare Edge Workers:
- Incoming ad clicks are assigned a test bucket at the edge based on campaign query parameters or cookie headers.
- The correct variant is served directly from edge cache in under 25 milliseconds.
- Zero client-side redirect, zero layout shift, and zero third-party testing script overhead.
the benchmark numbers
| Metric |
Legacy Builder (WordPress / Unbounce) |
Rally (Astro + Cloudflare Edge) |
Delta |
| Mobile LCP (throttled 4G) |
5.62s |
0.58s |
-89.7% |
| Initial client JavaScript |
1,180 KB |
0.0 KB (2.4 KB form island) |
-99.8% |
| Lighthouse mobile score |
31 / 100 |
100 / 100 |
+69 pts |
| Mobile bounce rate |
~42% |
~18% |
-57.1% bounce-off |
| Variant turnaround |
6–10 days (dev backlog) |
15 minutes (direct in CMS) |
40x faster iteration |
| Edge cache hit ratio |
0% (dynamic builder SSR) |
99.6% (Cloudflare edge) |
Instant global delivery |
| A/B testing latency |
300–600ms (client script flicker) |
0ms (edge-routed at cache) |
Zero CLS, zero flicker |
