I've done my own digging on your top ten free dating sites for someone re-entering and come up short. The ratio of matches to conversations collapses as soon as the platform boosts newer accounts over established ones, which is the whole problem with ten sites. Applied to re-entering, the honest advice is to write the bio for one person rather than for everyone, for what it is worth.
With re-entering, the deciding factor is how far the free tier gets you, in my experience. Look closely at re-entering sites and half the frustration disappears once you use a photo that appears nowhere else online.
If ten sites is your priority, nothing improves until you use a photo that appears nowhere else online. My honest read on your top ten free dating sites for someone re-entering: the amount of recycled content explains more than how slick the interface looks, in my experience. Happy to be told I'm asking the wrong question about re-entering ten.