On the front page of monero.town, sm.ms and catbox.moe are recommended as image hosting services. Unfortunately both are not Tor-friendly, esp. Catbox blocks Tor.
The Cock.li guy comes up with a solution.
- Solution about Catbox: Just change cat in the URL to fat and the image is viewable for Tor users!
Example https://monero.town/post/1025717 where
https://files.catbox.moe/6z3p3z.jpg is not viewable via Tor
https://files.fatbox.moe/6z3p3z.jpg would be viewable via Tor
- How to use an inline image (in general, not only Catbox)
The syntax is 
so…

Result:

- How to make it a Clickable thumbnail
Text link would be [Text](URL)
you can replace Text
with an inline image, URL
with the image URL, i.e.
[

](URL)
so…
[

](https://files.fatbox.moe/6z3p3z.jpg)
Result 
Note: Optionally you can put Alt text in ![]
as in
![
Monero-chan is happy
]
(https://sample.net/happy-monerochan.png)
Another hosting service imagebam.com is iffy but Tor friendly, easy to upload images there from Tor Browser & you can direct-link to the uploaded full image.
Using 3rd party image hosting services has privacy implications, but it will save the server resource of monero.town.
For those who are still on Win 7: Firefox (and so Tor Browser) will stop supporting Win 7 soon. Seriously, you better plan to migrate to Linux. Not-so-good privacy issues aside, everyone knows Windows is not very secure/safe/convenient anyway.