@Jann3 , so true! It used to be here in the forum that some hosts directly asked for it under each one of their posts. That was kinda tacky and has pretty much stopped. often enough, the original poster never comes back to check on answers, that's disappointing as well.
best would be if there where some kind of tool in place, like the check mark on instant messages or so, where one would know who has seen the post, beyond the generic "220 views". That would nicely separate a true approval/ thumbs up from a mere acknowledgment.
Another thing I wish people would employ more is to click on the @ symbol, then choose from the profiles that are popping up, to whom they are answering to. now that tool has quirks too, you can only choose among the last 4, grouped around that post, but most of the time it really is helpful. plus, people get a notification email (provided that's in their settings) that they were mentioned, an incentive to come back and check.