You also get paid by selling your data with their tokens. I guess also to buy the data is the same story?
Why would an individual buy somebody's data? I think it works only one way, you sell your data, Bitron will collect it, analyze and sell it further to interested companies so they could use this analysis in order to improve their digital marketing campaigns.
I don't think there would be some obstacle for individuals to buy data but as you stated it would be meaningless and not expecting any individual go for it.
But if a company is interested in buying data from Biotron, will they be able to pay in fiat or do they have to pay Biotron tokens for the data?
No, obviously only payments with Biotron tokens are possible. That's from their white paper:
'BTRN is a utility token that enables the trade of data between data providers and consumers. It is the only option for data consumers to pay for access to data and the only method by with they can compensate
their providers.'So, lets say, a company wants to buy an analyzed data set from Biotron for $20.000. Does this mean they have to go to a marketplace, buy ETH worth $20.000, transfer that ETH to an exchange where Biotron tokens are listed, buy BTRN tokens and pay Biotron then with these tokens? Sounds pretty complicated tbh.