In "
Preferred License?" André Fachat and I discussed a license choice. (Neither of us are lawyers. If anything of value is at stake, or you are acting for a business, get legal advice.)
In that discussion, both of us were OK with commercial usage, but we wanted the sources we write to be available to all end-users, not locked away. LGPL fits this bill.
There is a flowchart for choosing a license which I've shared before:
Simple description of popular software licenses.
I would advise against writing your own license, even with legal help, if the legal help is not especially skilled in copyright law.