Counterintuitive as it may seem, this startup may be doing things right. If user growth is causing load issues, that means users like the product, and that the company is growing fast, which is the high bit of predicting whether a startup will succeed.

A startup with a product users love but creaking infrastructure is better off than one with excellent infrastructure and a product that's a dog.

Startups with both a product users love and excellent infrastructure? A lot rarer than you might think, especially at this stage.