To be able to do a bulk upload with ysm you must first have a gold account, to get a gold account you have to spend $500 a month for three consecutive months or $1500 in one month. Until you spend these amounts the option will not be available to you in your account. However, when I started with ysm I was testing out new keyword tracking software.
Basically I had to setup the campaign in ysm and then download it as a csv and upload to my tracking software which would add variables to the url and then I would have to upload the new csv back to ysm and I ran into the same problem. I just called them up and told them what I was doing and they told me I could email the csv to them and they would upload it to my account.
I also told him that I was testing tracking software and asked if I could only do this once or a few times, he said they could do it as much as I needed. I was able to get them to upload a new csv for me at least a half dozen times. Call them up, mon-fri at (866) 924-6676 and tell them you need to upload a campaign and that you would like to send a csv for them to upload for you. Word.....