DesignSpark for Professional Use?
You may not get the answers you are looking for on here as only a tiny fraction of users ever visit the Questions & Answers pages.
However, on the Connect page It looks like a total of around 27,000 users are involved in Hardware & Software design, or just Hardware design. On Hobbyist it’s 4780 and Students 8774, after that a raft of ‘other categories’
So, this would imply a great many are using DesignSpark PCB in a professional capacity