Some of you may or may not have been hit by the recent penguin update. Like many i can see no damn pattern or method to googles madness. Some sites got hit and some didn't. The sites that got hit some of them were clients and I had many phone calls that day telling me something that i already new... That there ranking had dropped. But i had to think fast and improvise a solution..I explained that it was due numerous reason onsite and offsite but i also assured them that it wasn't due to my link building solely as i could show them numerous sites that were still flying high after the update from the rest of my poertfolio. But here it comes... Because of the fact that Google made an update we had to improvise and adjust our strategy (not because it was the problem in the first place) slightly as it is essential to keep in line with google algorithm updates. To that end we will have to increase the monthly price slightly to keep inline with these updates and ensure your ranking's keep increasing. (then add what you like onto their monthly premium). Now this may or may not work depending on how badly your client got hit and also depending on how much of the rest of your portfolio did not get hit. you need to show them some fo your other clients who you were doing exactly same seo work on and prove that it was not completely down to your link building. But all in all, do actually use that extra cash to invest in quality work for your clients. The pattern i am recognizing is unique content around your back links only on every back-link no more spun crap. Sorry to say it but it may work short term long term your sites going to get hit.