I've gotten a lot of clients with good reviews for free.
Yelp started calling constantly and bothering me to try their "FREE" promo,
After I repetitively said no, the rep said it would be free $500 in ads for one month! "Just try it!"
I finally gave in so they'd stop calling.
After the first month, I tried cancelling but it was nearly impossible. Contacting then through phone or email was a nightmare. I ended up paying over $600 in ads because I had to put in a couple disputes with my credit card company to remove them! What a tremendous hassle.
And can't even leave a Yelp review for Yelp lol