I am a chef. Being a chef and eating out, I sometimes get a professional courtesy of a couple free apps or dessert or a glass of wine for free or have had items taken off the bill. It is a courtesy and I always tip up to pay it back to the server. I think often times tattoo artists offer a courtesy to repeat clients & friends, but everyone should know it is at their discretion. I think some clients place too much emphasis on the bond they may create with a tattoo artist. Getting a tattoo is a very personal thing. You are letting someone alter your body by piercing your skin thousands of times. You have to have trust. That said, the client has to understand that they are sitting there paying for a service the artist is offering. If they are unhappy with the arrangement they can chose to leave or alter it. If an artist cuts you a "deal," say thank, give them a better tip and most of all don't expect that every time you get work done. Professional courtesy is a courtesy, not a given and definitely should not be expected. By coming to expect's it, the client under values the artist's skill and the relationship between artist & client. I have been hooked up by tattoo artist friends and I have paid $250/hour. Each time I go in with only one expectation....a good tattoo.