VIRALITY · WORKED
K
=
i
×
c
=
3.5
×
0.20
=
0.70
invites × conversion
reach
=
1
+
K
+
K
2
+
K
3
+
…
=
1
1 −
K
=
1
1.00
+
0.70
1.70
+
0.49
2.19
+
0.34
2.53
+
…
→ 3.33
Σ
=
1 / 0.30
=
3.3×
K
= 0.7 → paid spend × 3.3
K must be > 1
K amplifies paid too