Add info about rewards for adventure 4

adventures/04-blind-by-design/docs/beginner.md

@@ -45,12 +45,9 @@ Your Codespace comes pre-configured with the following tools to help you solve t
 - [`jq`](https://jqlang.org/): Pretty-prints and filters the JSON evaluation details that come back from the SDK.
 - A **flagd sidecar** — already running in the devcontainer's compose stack on the docker-internal network. The lab reaches it as `flagd:8013`; you don't need to forward its ports to play this challenge.
 
-## ⏰ Deadline
+## 🏆 Rewards
 
-Tuesday, 26 May 2026 at 23:59 CET
-
-> ℹ️ You can still complete the challenge after this date, but points will only be awarded for submissions before the
-> deadline.
+A **50% Linux Foundation certification voucher** for 1st place and **Credly badges** for the top 3 — for players who complete all three levels by **Tuesday, 26 May 2026 at 23:59 CET**. See the [adventure overview](index.md#-rewards) for ranking rules and eligibility details.
 
 ## 💬 Join the discussion
 

adventures/04-blind-by-design/docs/index.md

@@ -18,6 +18,16 @@ OpenFeature is a vendor-neutral standard for feature flags. The reference cloud-
 
 In this adventure, the lab uses OpenFeature exactly the way a real engineering team would: a Spring Boot service holds the SDK client, flagd holds the flag definitions, and the targeting rules in `flags.json` decide what reading every subject ends up with. By the end, you'll have wired the SDK in from scratch, learned to record outcomes by cohort, and rolled back a misbehaving Phase 3 trial without redeploying.
 
+## 🏆 Rewards
+
+Adventure 04 is the **first adventure with rewards**. To be eligible, you must complete **all three levels** before the deadline: **Tuesday, 26 May 2026 at 23:59 CET**.
+
+- 🥇 **1st place:** a 50% voucher for a Linux Foundation certification
+
+Additionally, the **top 3** finishers each receive a **Credly badge** to showcase the achievement.
+
+> ℹ️ Ranking is determined by total points across all three levels. Points per level are awarded by submission order within the active week (100 for the first valid solution, 95 for the second, and so on; late submissions still earn 60). See the [points & ranking rules](https://community.open-ecosystem.com/t/about-the-challenges-category/16) for the full breakdown.
+
 ## 🎮 Choose Your Level
 
 Each level is a standalone challenge with its own Codespace, building on the story while staying technically independent.

adventures/04-blind-by-design/docs/intermediate.md

@@ -77,12 +77,9 @@ Your Codespace comes pre-configured with the following tools:
 
 The flagd sibling that the Beginner level introduced is still running here — the broken-state `OpenFeatureConfig` already targets it via `Resolver.RPC` (`flagd:8013` from the workspace, `localhost:8013` from your host).
 
-## ⏰ Deadline
+## 🏆 Rewards
 
-Tuesday, 26 May 2026 at 23:59 CET
-
-> ℹ️ You can still complete the challenge after this date, but points will only be awarded for submissions before the
-> deadline.
+A **50% Linux Foundation certification voucher** for 1st place and **Credly badges** for the top 3 — for players who complete all three levels by **Tuesday, 26 May 2026 at 23:59 CET**. See the [adventure overview](index.md#-rewards) for ranking rules and eligibility details.
 
 ## 💬 Join the discussion