I have a domain that is over a year old. about 25 pages of content. I am not constantly building links, but when i do I normally build slowly. Each time I build links I usually build 15 manual web 2.0's(spun, decent readable), youtube link,few pdf sites with some social network(web 2.0s) I am trying to rank a keyword. So a few days ago put up a new 500 word article on each of the web 2.0's and linked to keyword and homepage in each. All the keywords were generic. Now the keyword has gone from 17 to 38 and is up to 31 now today. I am thinking that because I built links on web 2.0 that were already indexed I got links to my site all at once and maybe this did it. Also my traffic has dropped by 30%. Should I keep building good links?