I'm the mod for a blog called ask the koiponies on tumblr. I've been working at it for almost two years without success and I figured a set of fresh eyes might have a better idea of what I'm doing wrong.

http://koipony.tumblr.com/tagged/koipony/chrono

pro tip: your post appears only in the 5 first tags you put on your post. put the most imporant and popular tags there first (like fandom. avoid putting oc names and and blog names and such in the first 5 tags)

also tumblr has way too many ask pony blogs so you have to actually have amazing art or amazing idea or you just have to be really lucky to actually gain visibility.

but i could promo you if you wanted. i have 6k followers and plently of them could be potentially be interested in seeing your work

Mutisija said:
pro tip: your post appears only in the 5 first tags you put on your post. put the most imporant and popular tags there first (like fandom. avoid putting oc names and and blog names and such in the first 5 tags)

Did all of that and I started it back when ask blogs were still a new thing.

The 2 best things you can do for a successful ask blog are to be sexy, or funny (or both).
Art quality helps either, but being funny in particular can excuse mediocre art.

In reality, there's no winning formula for being a hit online.
There are multi-billion dollar companies searching for the same answers.

Mutisija said:
but i could promo you if you wanted. i have 6k followers and plently of them could be potentially be interested in seeing your work

ask the koiponies but I have been featured and promoted by popular blogs before, simply put my blog or my artwork in general is not what catches the general audiences eye. (I'm not trying to sound smug, I'm saying my art is shit and my writing is only slightly better than that.)

Halite said:
The 2 best things you can do for a successful ask blog are to be sexy, or funny (or both).
Art quality helps either, but being funny in particular can excuse mediocre art.

In reality, there's no winning formula for being a hit online.
There are multi-billion dollar companies searching for the same answers.

Basically yeah, but I don't do sexy art well, and apparently I'm not funny.

Your posts seem to lack full timestamps, so I can't tell how old the blog is. Something to note, is that not all followers will be asking questions or interacting with the blog. When I had one running, it admittedly had crappy as hell artwork, but managed to get a decent following, and several consistent questioners.

Have you tried posting your work to derpibooru along with a source, not to your tumblr, but to the exact post the image came from? That's what I did with my artwork (Although, I think I actually posted it to ponychan while it existed), and might have been part of why I got consistent askers.