I've had multiple positive interactions with many pet sitters on Rover. Most recently, I've found a consistent house sitter for my 4 pets who has watched my home & pets multiple times since I first hired him from the site.
There appears to be a misunderstanding with some people for the role the website plays when an owner is hiring their sitter for pet care. Before deciding to book a service on the site I checked their terms of service and also their descriptions. They are the neutral party/tool that a business owner uses to list their services. I can kind of compare it to Angie's List but specifically for pet care. Sitter's list their personal business, owners hire the business if they think it's a good fit.
When I book my pet sitter, I am hiring the pet sitter for their advertised service.
While I was searching for a trusted house sitter, I interviewed at least 5 different sitters both via messaging and in-person with what I think Rover calls a Meet & Greet. Overall, I was the one taking the time to ensure the person I allowed into my home was a good fit for my needs and my pets' needs.
When hiring anyone, it should be treated with care and intentional conversation. The website also has some handy tips & article that guided me on my questions to ask my pet sitter when determining their fitness for what I expect from my sitter.