Pete, the designs you have on all 3 sites are awesome. I really mean that. They are so good they are probably being ripped off by other people right this minute. You should be proud.
Now that we've got that out of the way... One order of tough love, coming up!
PB Lab said:
In the last three months I've generated a couple thousand unique hits and sold only a handful of shirts, giving me an almost non-existent conversion rate.
After clicking through your site again, I am not surprised. You did not take our previous advice about fixing it.
There is still a chunk of random text at the bottom - which now doesn't look like it was put there just for search engines, but still serves no relevant purpose. Some of it would be OK in an "About Us" type page.
When I click on "Customer Service" and "FAQ", I get a message saying you are "working to fix the problem as fast as possible". Obviously I don't believe you, because has been a month since I last saw that page and nothing has changed. How are customers supposed to feel safe about buying from a website that doesn't appear to be finished?
There is a lot of other stuff that needs to be addressed as well, but because I have given you this kind of advice before, I am not going to write it all out unless I actually think you want to hear it. So PM me if you do, and I will be happy to help.
Bottom line - If you fix everything that you should fix, and spend a lot MORE time with marketing, you will be on the right path. If you are the kind of person who can only focus on one thing (designing), then outsource your marketing to someone else - but it is vital that you do market your site, because nobody knows how great PB Labs is until they see it.
If you're not ready to put in a lot more hard work, then yes, you should give up, because no amount of feeling sorry for your poor, unvisited websites is going to make people buy stuff.
All in all, 3 months isn't enough time to know if this is really going to be successful or not. Think about the rest of the things you have done in your life. Anything else you were ready to give up after only trying for a short time? I hope not, or you would be uneducated and jobless!
Anyway, that's all the tough love I can come up with for now.