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by pknopf 2264 days ago
Absolutely.

My company accidently used one of their GPL-only products (on screen keyboad), thinking it was LGPL. We did the right thing and reached out to them to pay for it after it was already deployed to customers.

We had to pay for the entire Qt platform. 20,000 dollars plus a per-device royalty. That was a big mistake on our part, not paying attention to the licensing.