With respect to the Linkedin Jobs search feature, TopTal lists the same long list of positions for every major city. This pollutes the search results so badly that they become useless.
https://imgur.com/h8vOXGA
Additionally, a few years ago I gave in and applied to TopTal. After passing the HR interview, two automated timed coding challenges, and one of two live coding challenges, I failed to complete the final live coding challenge. Their process is arduous and stressful, basically representing the worst of what many people on HN complain about in interviews. Had I passed that fourth test, I would have then had the privilege to do a 1-2 week full projects, polished and production ready, to be presented with a professional Powerpoint and suit+tie consultant style. From what I've read, you can do everything right... but if there's a small thing they don't like about the presentation, you're out.
What it boils down to is a massive amount of promotion to entice you to apply, and a frog-in-the-pot interview process whereby you're most likely to end up boiled rather than survive and get a job with them. They proudly promote that they reject 98% of applicants. Some of the ones who do make it on board have later complained that they were encouraged to set lower than market rates for their (expert) skills, presumably to please the clients.
When you sum it all up, including the Linkedin spam, I find it extremely distasteful and a prime example of what's wrong with hiring.