The bar here is set by how cheaply you can fake it. A ChatGPT prompt already does a passable 'act like a brutal VC' for free, and founders can rehearse with angels, accelerators, or a deck-scoring tool. So what earns the signup is the part DIY can't copy: personas grounded in how a named partner actually behaves, a consistent 12-dimension scoreboard you can grind against, and a warm landing at the fund if you clear it. If those three hold up, the generic mock-VC prompts stop being competition