Personally,,, this is bad advice to follow. An altcoin could pay 10 exchanges a listing fee for 1 week (and we all know this happens a lot, maybe less these days but it still does). I do agree it is "safer" because it does mean the project has money to pay for listing but I also feel this could trick a lot of people into thinking it is the next big thing and then before you know it,,, listing period ends and you have nowhere to sell but the exchange where the owners list dump pricing buys.
The trustworthy exchanges don't have this system for listing a coin for just 1-2 weeks. If you want to list your project in a major exchange such as Binance or Huobi, then you need to pay the listing fee (which may amount to several million USD). On top of that, there will be very careful screening of the project from these exchanges and if the inspectors flag the project as shady, then they will return the listing fee and refuse to deal with the project. So in 99% of the cases, if a project gets listed in Binance or Huobi, we can be assured that it is a genuine project.