Well, most of the members doesn't know how to post the image in right way etc.
I'm sure that you used google or bing to search for app's icon and copied the link
Example of wrong link (without img tag):
https://lh3.ggpht.com/a_zUJVbmkSHuRH0bpFbhDW99wV1cyoY-LpGO8kq-mpZQokkUK5-FWiOQyY2VVTSrVQI=h900
Opps.. you got this error "You are not allowed to use that image extension on this community."
Why? Because the link has to end with .png , .jpeg , .jpg , .gif
Examples of right images' link:
.jpg
https://s-media-cache-ak0.pinimg.com/736x/d1/91/c9/d191c9c75bb6b718f5b6d9158eec23b6.jpg
.png
https://lh4.googleusercontent.com/-6VrEU9-Cs_s/U09llUx7FyI/AAAAAAAABVI/jbn8lXtUHZI/w480-h720/anime_girl_render_20_by_nunnallyrey-d6tjthi.png
.gif
https://38.media.tumblr.com/b516b22a57f6b5ea3f50a0da96f4c6c2/tumblr_inline_nor6bfmNCF1rgmz14_500.gif
Old way:
Noobie way:
For GFX topics, any size is fine, but prefer to be in spoiler tag. Because, it makes it easier to read without having many big images in a post.
For Requests topics/hack, please don't post big image of app's icon or realated to it.
How to fix it?
Lazy way which is to copy the link and post then member have to click the link to be able to view it
Image link:
http://imgur.com/hlaV60E
Direct image link:
http://i.imgur.com/hlaV60Em.jpg
You can use this guide to put images/gif in your signature! https://iosgods.com/index.php?app=core&module=usercp&tab=core&area=signature