It depends on what you call "businesses". Corporate is less than half of the economy worldwide and these typically have huge team in-house developing their own software or they're renting consultants from the big four.

But if you mean that PMEs, small mom&dad shop, independant workers etc. do "spend more money to make more money" than joe-six-pack who's only using the net for fun and not for work, then sure, there's more money there.

But to corporate? No way. It's a big niche. But it's a niche and it's very hard to get into.

It may have worked for you, but that's not where most of the money is.