There's always people who milk things on every platform and i think it's common. You shouldn't think about these guys, just focus on your blog and do what you want because if you don't and you start milking it or exploiding it with out you liking it then you get bored of it finally, thats why alot of top youtubers for example do what they want because they get sick of trying to be the best. They just accept the thing that if people like how they work then it's good but if not then they don't make big deal out of it because the creator himself is liking what he/she is doing, then will someone else too notice them and follow them
Good advice @riotpigeon, personally I don't harp much and actually happy people get to earn on the platform :)
i mean yeah , as long you enjoy it is all good, because im sure you don't want it to be a job :)