I initially wrote a longer comment on Radewoosh's blog but realized the following part is a completely separate thing.
Wanting to get contribution is a good thing.
It's an incentive to literally contribute to the community. This is how rankings work. People dream to be top10 rating one day and it motivates them to work harder. The "top contributors" list has the same goal: to incentivize people to help others.
I don't mind if someone says "you want to get to top10 contribution" to me, and I joke with friends about it (also about Swistakk and Radewoosh). The bad thing is that a comment like this can be seen by others and make them less motivated (maybe unconsciously) to contribute. You likely don't realize how much the feedback matters. Preparing contests isn't more profitable than working in a company, but it's so rewarding to know some people liked your problems that it motivates you to do it again. It should be similar for writing educational blogs.
The contribution isn't a perfect measurement and for example fcspartakm has so incredible impact on the whole CP world (he works on Polygon) that he deserves to be top10 easily. There are so many people contributing locally too. kostka recently organized a relatively cheap camp for polish representation for IOI (and a few people next in line). He invited me and a few others as organizers and paid us, did most of the problems-related job himself anyway. We got some money (a payment/salary as agreed earlier), he didn't. He spent week+ of his time and some money on gasoline, and he didn't get anything. It's good to appreciate people like that. While an upvote is a nice easy thing, remember that you can always let them know that you appreciate their job and commitment.
(And I'm not saying you should start spamming some people now, because that would be annoying for them ;p )
So remember: saying "you just want contribution" basically means "you just want people to find your comment/blog useful". It's a very stupid insult. Btw. I have some predictions about the first comment under this blog xd