Usually you believe you can make money if you deliver value to the customer. In crypto people don't believe they deliver value, they scam or prey on fomo.

There are absolutely people who go into B2B data integration startups with the belief that they are providing a useful service to their customers. Do you really doubt that?

I got some surprising news for you. There are people who passionately work in B2B data integration. All successful B2B startup founders i've met are very passionate about their field. Now for those founders who don't have much interest in the field they are working on - they are hardly those who you would call successful by any metric. Life is too short to waste it on things you don't care about.

I believe they believe they are helping people and the work is valuable at some level, if they are successful, yes. At the very least they aren't intrinsically opposed to the field.

What does it mean to Really Believe in B2B data integration?

You should be passionate about delivering a viable competitor in that problem space, or why bother?