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Or in your business language: We can give away our product for free, said no successful business ever.
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Depends on what you mean by "for free" :- There's Google...
you pay google by advertisement
maybe we can put some advertisements on every TXs

"sponsored by Coca-Cola"
Google didn't start out by charging for searches, email, etc. Had zero ad revenues because zero ads.
I guess Google should have started out by charging for its services, would have been a multi-gazillion-dollar co. by now.