Can I get banned from giltch if I use a external Pinger for my project?

Can I get banned for using a external Pinger I’ve heard I can I just wan to make sure it’s true

We reserve the right to delete, suspend, or terminate your access to, or ability to use, any and all Services that we determine to be placing undue strain on our infrastructure. These changes were made in response to ping services on Glitch and our efforts to make the site more stable. You can read more about those efforts here.

Pinging can indeed be deemed as “placing undue strain”, therefore your account can be banned.