yes - support is important when we are talking about websites or anything from code canyon… etc
but when it comes to works like flyers, posters or even some scenes for aftereffects… is support that important? In case of photoshop poster or AE scene simple PDF help file explains everything… if someone needs more than help file I bet he/she needs tutorial for software itself
I had some emails like “what software I need to edit your PSD files?” … so my answer was always "if you are not familiar with Photoshop… if you don’t know the basics of this software… I recommend you (and here are some links to Youtube tutorials).
Otherwise I have to teach every customer like this the software basics… which is… months of teaching hehehehe
That’s my point of view. Peace
But my point of view is not 100% legit… my point of view is from author position.
This is very personal thing - everyone should decide for himself.