We have many of this service provider, thought some are better updated than other because I know some of them demand something in return from the developers to get their project listed on their platform.
Yes, that's why this one is crowdsourced. Anyone will be able to submit a pull request and add their project (unless it is non-existent) so it should be the most up to date. No payments.
But I know some site that will not add a scam projects, or even remove it when it is obvious that the project is a scam, that means you will be promoting scam project because there is no due diligence