Displaying images: any FAQ?

Apologies if my perfunctory search wasn’t enough to find any answers already put on the site, but in our caption competition thread in Thread Games, I’ve often struggled with getting images to display reliably for all users. The advice I’ve been using is to ensure I post a link that ends in .jpg but the linked post above is an example of it not working for everyone.

Would someone kindly post a brief checklist or similar showing the steps I need to take in order to post images without causing viewing problems?

I suspect that this is an issue with the image host, not with the SDMB. If that’s the case, there’s not much you can do beyond finding a different host.

@Chronos is correct. That’s entirely the hosting site, not SDMB.

For an alternative hosting site, I like https://postimg.cc. Others have good luck with https://imgbb.com/.