I've been mulling on this idea, I've always been a fan of companies that find value in weird places
The idea is this
-Go to grocery stores and offer to pay them so we can control their audio systems
-From their contact brands that sell products in said grocery stores and try to get them to buy ad space
-Profit?
I've put some thinking into this, such as what's the CPM for audio advertising, what hardware/software would make this possible/valuable, and other things.
Honestly I'm just spitballing, any thoughts?
If you are doing for the first time, go small. This will work but need to be executed at scale with a lot of things things required to get it executed including the agreements, time to convince people to come on board, software systems and a lot. As an IndieHacker, it would get only tougher.
I would highly recommend to go small if you are doing for first time and Micro SaaS Ideas could be a good starting point.