Make pixeldrain more round

webcontroller/file_viewer.go

@@ -78,10 +78,10 @@ func (vd *viewerData) adType(files []pixelapi.ListFile) {
 	// Intn returns a number up to n, but never n itself. So to get a random 0
 	// or 1 we need to give it n=2. We can use this function to make other
 	// splits like 1/3 1/4, etc
-	switch i := rand.Intn(4); i {
-	case 0: // 25%
+	switch i := rand.Intn(5); i {
+	case 0: // 20%
 		vd.AdBannerType = brave
-	case 2, 3, 4: // 75%
+	case 1, 2, 3, 4: // 80%
 		vd.AdBannerType = aAds
 	default:
 		panic(fmt.Errorf("random number generator returned unrecognised number: %d", i))