Lightningbolt is usually a very good bot, but yesterday it skipped me for the first time:
https://steemd.com/tx/76247de04d1a791a057721423f8506798c47f38c
If steemd.com does not open the link you can replace steemd.com with one of the other blockchain explorers.
I sent it 0.03 and got no vote and no refund.
In your defense, some but not all of the other good bots that I use either skipped me too, or ceased to operate.
I prefer a refund over a manual vote.
Manual votes usually turn to be bad.