The generated minion seem to be fuzzy to look at, and roslinpl is right, it contains more characters compared to the number of maximum allowed characters in signatures which is 4000, which also makes the minion unusable for a signature example.

Roslinpl himself have his own BBcode tutorial for those wanting to get a nice knowledge about them and to somehow monetize your signature design skills with it. BBcode designs, though harder, can be a way to use less characters but have a refined and unique look if you used it correctly.