Is Forum Posting Brain Twisting andTime consuming?

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I stumbled upon a site that pays their members to post on their forum. I was so skeptical at first if they are legit, but then I still tried to post until I reached the minimum payout within my very first day. And guess what? They paid me hours later.. But for you guys, Is forum posting time consuming? Or sometimes it's brain twisting since we need to squeeze our brains just to come up with some opinions about the topic? Well I guess, for me it's worth my time since they are paying their members, That's more important than browsing some other sites that hardly pays their members.