This is quite complicated.

In short term, it looks good because they can find their future love on steemit. But for someone that doesn't have interest in love, this will be a big problem(or very annoying) for them, imagine if their followers or their friends or someone else ask them "why are u still single on steemit?". They will feel like they are forced to find a love because their environments tell them to do that. And if they find their love because of that reason, even though they become a couple, there's a good chance they will broke up. What will happen after they broke up? There's a high possibility trending and hot posts will get dominated by angry couple posts. Imagine if many couples make angry posts and boost it to trending and hot posts? Steemit slogan will be "find your love on decentralized platform".

In long term, this will be dangerous. When someone find their lover on steemit, they become a couple and they broke up because their personal problems, then they make their angry posts on steemit. Someday, when they find another lover in real life and marry them, their lover found out about their past relationships on steemit, they can see how lovey dovey their husband(or wife) with someone else in the past, maybe they will divorced and their kids will lose their parents because of this.

So my opinion is : it's better for steemit to not following facebook steps, but try to do something different.