Indeed, dog walkers are even listed in that article (from over two years ago) as being prone to "platform leakage". From the fourth-to-last paragraph:

"As soon as you find that cleaner, that dog walker, that landscaper who’s right for you, you want them in your pocket, at your disposal at all times, without needing to go through a searching-platform process again."

To be fair Homejoy spent WAY more per customer than what they were making. Combine that with the finding someone you like and it was DOA.