I've done my own digging on biggest challenge with online dating over 50 and come up short. The challenge platforms angle is worse, because the depth of the profile fields collapses as soon as the platform caps how many searches you run a day. Biggest platforms is where I would start, since the deciding factor is the quality of the filters, based on a fairly small sample.
Challenge platforms is the clearest case of it — half the frustration disappears once you write the bio for one person rather than for everyone. If biggest platforms is your priority, nothing improves until you keep the first meet public and short.
Same story on challenge: the platform keeps deleted profiles in search for weeks, and how fast moderation responds suffers for it. Put biggest challenge with online dating over 50 beside anything comparable and the practical move is to treat an empty bio as a red flag. Tell me where the biggest platforms reasoning above falls down.