The rumour a decade ago was that Adobe was the biggest producer of Adobe cracks. The idea was that it'd get people using it for free so it was the goto tool and then they could slam anyone using it commercially.

They can be still efective. Even a simple scheme may prevent a corporate user misusing some 30 day trial over and over and instead go through the trouble of getting proper license.

Yes, it's probably worth it to get a simple scheme for corporate users only. But Photoshop's protection isn't simple, but it is so widely cracked that in third world countries with limited internet access there are wandering sellers with DVDs of cracked Photoshop for 2-3$ (!)