Explicitly asking for upvotes is probably bad internet etiquette.  (And it doesn't really help if one thinks "it's justified in this case".  I'm sure lots of e.g. religious people would think the same.)  It so happens that there was a post about this on the EA Forum recently, which among other things describes adjacent approaches that are less bad: https://forum.effectivealtruism.org/posts/sDkHTdBsrpz7teMR2/please-don-t-vote-brigade