I have to agree with Chris. The world of review sites is a shady one, many are faked which is also illegal under many regions laws, or they are paid reviews which is also a legal grey area.
Anyone buying hosting from these so called 5 star recommendations on review is very naive imo. Often if you do a good job for your client you don't even need to ask for reviews.
I had a new signup a few days ago who said the following after migrating him, I never even asked for feedback:
"Once again I want to thank Lee and everyone at LJSHost for making
my changing Host Provider experience smooth, quick and painless."
Just collect your own reviews and page make your own reviews page. Happy clients will say nice things without you even asking.
But don't be a scum bag and write a load of fiction, real reviews from real people, a business should never be built on lies as I'm afraid is the case with many firms and their paid for adds and collusion with the review sites to get them in the BEST TOP 10 and control what people think are the best firms.