That would surely cause all of your other customers to freak out that if they became successful you'd do the same thing to them. Your reputation for fair price

That would surely cause all of your other customers to freak out that if they became successful you'd do the same thing to them. Your reputation for fair prices would be ruined and all of your customers would now be building their own versions of your platform. Effectively your startup would be over, since nobody would ever trust you again. And, presumably your investors wouldn't be very pleased with you, so I guess you'd be looking for a new line of work, too... (That's not say that vendors won't increase their prices, but they will have to do so slowly. Meanwhile the founders of Clubhouse will be aware of this and no doubt building the replacement platform that has everything they will need...)