Yeah if anyone has worked at a B2B SaaS startup you would see fast that a large portion of the VC money is just buying other SaaS startup products.

We were basically required to buy all of the products our investors also invested in, and in return they would buy ours. Eventually all of those $10-20/user/month subscriptions add up and really hurt your runway. When I left they were paying for around 30 different subscriptions. Don't get me wrong most of them were useful and cool products, but they definitely were not required.