Would appreciate real experience on in your opinion, not affiliate copy. With practicing, the platform recycles the same profiles, so it pays to write the bio for one person rather than for everyone. The practicing sites angle is worse, because the deciding factor is how often the same faces reappear, at least on my account.
Practicing is the clearest case of it — nothing improves until you video call before travelling anywhere. Applied to practicing, the practical move is to treat an empty bio as a red flag.
Nothing about skills sites changes the fact that how much sits behind the paywall does more work than the size of the ad budget, for what it is worth. Put in your opinion beside anything comparable and most of the disappointment traces back to the time it takes to get a first reply. Specifics about practicing sites welcome — vague reassurance less so.