I'm not a fan of today's VC model and have never taken it myself, but the best-case scenario for taking VC is when you're having trouble keeping up with demand.

In some cases, this is because you've tapped into a big market and sales are moving faster than you can scale your operations. You need to do the same thing you've been doing, but you need to do more of it quickly.

In other cases, you might have found a way to drastically increase sales, perhaps from building a new line of business that complements your old one.

HQ Trivia needs something that you can't get with more money, and that's a creative way to avoid being a fad. They needed a way to keep people on their app, and they didn't find one.

As you've seen from Instagram's wild success at this (before Facebook's acquisition) and Snapchat's decline, money isn't really a factor. It's mostly luck, honestly.