No, votebots are generally either used to "assassinate" by targetting a specific account with downvotes or to bolster an account, probably one that belongs to votebot owner, with upvotes. The XP the votebot account gets for voting is not a concern at all. Remember that the chance to gain XP for a vote you receive is much higher than the chance to gain XP for a vote you spend.

Also, I remember when I got only 15 or 20 votes, they rarely were enough to upvote all the posts I wanted to. Now at 40, I'm somewhat hard pressed at times to spend them all, true. Other days, I spend them thoughtfully and they're still too few.

So, if anyone puts up even a semblance of participation, I don't think they can even afford spending votes blindly.

Makeshifts last the longest.