I think OBT had a very open generous bandwidth situation.
It was run off a private server..etc. We had many graphics in our smilies too,
and chatrooms (which when they were installed I recall led to a crash)

But here, it seems that bandwidth and control of linking would
be an issue in the signature function. Now that Ticker allows linking
so that the time can be factored into the graphic...many other places DO
NOT accept linking.. So linking in the signature may be an issue here.

Or maybe it is a default..and we just have to request the default be
changed.

I certainly had my own confusions posting a small graphic in my own signature, and I don't understand the internet well, but often there is a "reason" for something.

Now that this forum is establishing itself, perhaps some more gifts of graphics will be forthcoming? But if not, we should understand that too.
Just my opinion.