MyBB Community Forums

Our forum displays the uploaded graphics, not thumbnails.
Our hosting is on a shared server, and our provider has an AUP with inode limits, even though file size is unlimited.
I want to know if I can delete the thumbnails and keep the full size files without impacting the forum display.
We have a 260K inode limit, and we're approaching 88%.

What are my options? 
Thanks in advance for suggestions.

With 66 views and no answers, I'll have to try to answer my own question, although there is no certainty it is fully correct.

I created a mirror of the forum on a local server, then deleted all *_thumb.* files.
I am still able to see the posts with images as before.

However, I'm aware the mybb_attachments table has a populated thumbnail field.

So, I'll repeat my question. Is anyone aware of an impact to forum performance if the thumbnail files are deleted?