There is a concept of ‘code smells’
any characteristic in the source code of a program that possibly indicates a deeper problem. https://en.wikipedia.org/wiki/Code_smell
I think there are some good smells for packaged software. Like fresh chocolate chip cookies.
The first and greatest is a great big button that says download to try it out, bonus points if I don’t have to register.
Letting you run the full suite for two hours at a time is also nice.
The nice fresh smell is to know how much the software costs without requesting a quote.
Bonus points, an active forum