How? If he wasn't running, the republican wouldn't have gotten those votes anyway.
Some people are Losertarians because they want drugs legalized; others are Losertarians because of financial issues - taxes, spending, etc., and are business owners. Even though the GOP has been spending big, many of those Losertarians would have voted their pocketbooks anyway and voted GOP in order to at least keep taxes down and the economy going. I know this for a fact, having been a member of that party myself for several years, and always voted GOP, along with a lot of others in the party. The GOP lost quite a bit of the Losertarian conservatives this cycle, but had there been no Losertarian candidate, they would have picked up some votes there - most likely enough to put Burns over the top, by the look of the vote tallies.