[apollo1213]

The recommendation engine may not require ML. The recommendation can be based on statistics of customers browsing history.

[areoform]

While that may be true, any such application requires dev costs and some non-zero amount of computation. How do you pay for it while giving it away in a B2B capacity?

[apollo1213]

Agree, those apps can be free for a short period time to attract customers and they have to introduce pay plans to pay for all the costs.