itch.io

As a tip you should invest around 10k at first (I do it in radio), to get a lot of reach and with that you should be getting a little money at first. I struggled with it at first too.

Marketing and Awareness are Everything.
+ More employees is better because they sell more.

Pro tip:

Don't get the Dizzy's upgrade until you have enough money to spend on upgrading it. You need to spend a lot of money to make a profit with it. Then spend your money into marketing, that way you get awareness for your Dizzy's. 

The most successful dizzy's I run right now gets me at least 5 thousand pound per day. 

Also can also get awareness for your Dizzy's if you unlock the Dizzy's underground complex feature.