I agree, they do spam the piss out of the job boards. If they have such a constant need for foreigners, a better way of recruiting and retaining might be - god forbid - to offer terms that are actually competative in the current marketplace, instead of drowning out the competition with spam.

I have just emailed one of these recruiters and they as stupid as f..k with their replys.

Just worked something out with the PSB in Hangzhou  for a client we will call worker X, he received a legal work visa and FEC from Hampson but he wasn't able to read Chinese so for one year he had no idea that the working city and FEC were for the Mother Branch in Beijing. He had no qualms about Hampson but he found an International School that was more stable for his family. When it was time for him to go his own way, Hampson fulfilled his paper work requirements and sent him on his merry way. Two days later the PSB was at his door, asking why he wasn't registered at his apartment, "one year after", he happily showed him his passport and it got ugly. Of course they let him go and gave him sometime to try and work it out hence my arrival to Hangzhou, I took his documents to the PSB along with a copy of the License that Hampson had for Hangzhou and a picture of the License that was posted on the wall when you walk into the Hampson office. We succeeded in the transfer and a heavy fine for Hampson, but guess what, the license is under a non education area in Hangzhou, but there still up and running, remember, it's China

Years ago when I was between jobs (I'm not an English teacher) I went to them looking for some way of filling the void. They wanted me to sign a contract, in Chinese. Part of it was that if any student left the school specifically because of me, I owed them $2,000 USD! F@ck that, sez I. 
 

They wouldn't let me take the contract out of the building to have it looked at either, so I just walked off and never called them again.

Gee I didn't know it was as bad as the experience I had with them which was limited to talking to one guy who was in no way shape or form an interviewer. Place seemed empty at least the place I went to. Not really good potential to attract students or keep teachers around for long!

I work P/T at one right now. Prior to remodeling and going to a new location they got raided by the police a little before Spring Festival. I don't rely on them for Visa, I wasn't at the school when they got raided, and speak good enough Chinese to get more favorable compromises from them. My contract was in English (albeit with several errors). I think a lot of the clauses are pretty fair to their business model. There are few things you can do to blatantly make them lose that customer for the $2000(?) you mentioned, so I think it is possibly fair that such a clause is included (although I think it was less than that amount). 

You are still in China.  What is your 5year rule you speak of?