>>zkldi+(OP)
If you are so insecure that you need to buy upvotes to make the front page of HN, then you are probably in need of some psychological help.
>>MR4D+J2
It's probably less of a personal thing and more of a marketing/advertisement campaign thing.
The website itself claims to be organic advertising, and it's certainly something that would work. This is actually used in practice on sides like Reddit[1].