PLATFORM PROFILEEBAY
eBay
1.71
B-index (V3.1)
EVENT HORIZON
Capture0.783
Escape0.458
Key Structural Insight
Lock-in is seller-side and niche-specific. Vintage watch seller with 10,000 reviews cannot move overnight.
Eleven-Parameter Profile
Data Depth7/10
Memory7/10
Action5/10
Process6/10
Network7/10
Closeness6/10
Portability3/10
Substitutability5/10
Human Fallback6/10
Org Depth4/10
Momentum3/10
Capture Escape Extended
V3.1 Decomposition
| Component | Value | Formula |
|---|---|---|
| CES₄ capture core | 0.6221 | CES(d, m, a, p) |
| Knowledge synergy σₖ | 0.7000 | √(d · m) |
| Operability synergy σₒ | 0.5477 | √(a · p) |
| Synergy boost | 1.1872 | 1 + 0.3·(σₖ + σₒ)/2 |
| Org-depth multiplier | 1.2000 | 1 + 0.5·o |
| Momentum multiplier | 1.0900 | 1 + 0.3·t |
| Total Capture | 0.7825 | c·(1+0.5n)·core·syn·org·mom |
| CES₃ escape core | 0.4576 | CES(x, s, h) |
| Feedback attenuation | 0.7823 | max(0.3, 1 − 0.35·core) |
| Total Escape | 0.4580 | ε + escCore · feedback |
| B = Capture / Escape | 1.71 | 0.783 / 0.458 |
Scoring Rationale
Years of feedback scores, PowerSeller status, niche dominance (collectibles, auto parts). But stagnant growth (t=3). Amazon and specialized marketplaces fragmenting niches.
Parameter Sensitivity
MARGINAL B-INDEX CHANGE PER ±1 SCORE SHIFT
CLOSE6+0.57
PORT3-0.25
ACT5+0.21
PROC6+0.19
SUB5-0.19
DATA7+0.18
MEM7+0.18
FALL6-0.17
ORG4+0.14
NET7+0.13
MOM3+0.09
+ raises B (deepens lock-in)− lowers B (aids escape)
Comparable Platforms — E-Commerce (7 peers)
| # | Platform | Ticker | B-index | Zone | |
|---|---|---|---|---|---|
| 01 | Amazon Marketplace | AMZN | 7.77 | BLACK HOLE | Profile → |
| 02 | MercadoLibre | MELI | 5.87 | BLACK HOLE | Profile → |
| 03 | Alibaba/Taobao | BABA | 4.97 | BLACK HOLE | Profile → |
| 04 | Coupang | CPNG | 3.72 | BLACK HOLE | Profile → |
| 05 | Shopify | SHOP | 3.15 | BLACK HOLE | Profile → |
| 06 | Shopee/Sea | SE | 3.03 | BLACK HOLE | Profile → |
| 07 | PDD/Temu | PDD | 1.86 | EVENT HORIZON | Profile → |