Good advice!

There are unscrupulous foreign teachers who have weaseled their way into the recruiting scam.

Indeed. There are unscrupulous foreign teachers who have weaseled their way into ALL KINDS of scams. Don't fall into the trap of thinking that just because someone comes from a Western country, they'll be less likely to screw you over...if anything, the REVERSE of this may be true.

Personally, I got burned by an American-owned chain English mill much worse than anything that ever happened from a Chinese-owned school...and that's saying a LOT.
The bottom line here is that recruiters are just recruiters, no matter where the person you talk to comes from. Give them ALL a miss.