Those old instructions are anything but easy!
Imgur is easy to use as is postimage. Frankly, photo bucket has gone way down in user ease, and has lots of drawbacks.
Here's something from postimg.cc, and here's what works with just about any image:
Once your photos are on a photo hosting site (such as Imgur.com; Photobucket; Postimage; Dropbox, etc.), or on virtually any site, select the full image, then Control-click (Mac) or Right-click (Windows) on the image itself,
then choose copy image location. Now paste that URL (the full web address, which should end in .jpg) into the IMG box in the reply window of the thread you're posting to.