Would Ford compliment General Motors or Chrysler on a design or the quality of their vehicles. The Ford team may admit amongst themselves that the competition made a real winner, but would probably never tell the world.
So why should a penturner expect compliments from another penturner? You may be 1000's of miles apart or next door neighbors, but if you are selling your product you are competition. If I was a penturner and depended on it for even part of my living I would never post any of my work. Everything that is posted publicly is "fair" game to be copied and either butchered or improved up on. Your innovative ideas can be copyrighted, trademarked and written up in the journals of time, but they can be copied for personal use and most times you will never know about it.
Don't waste your time looking I am not a penturner trying to make a living at it, and I have never posted a pen on IAP. I am a hobby turner, I am the one that gives pens away or if I sell them I sell them for what I want, and that is usually a lot less than you would want me to. I am one of only a few, there are thousands that read IAP, but only hundreds that post on a weekly basis.
If you are looking for compliments then look to your customers for them. They are your source of sales. If you have customers you are doing something right. If you feel you don't sell enough, then you need to look at what you make, how good is it, is the price right, did you find your customer niche and a few hundred other issues. If you are in business then you have to treat it like a business.