I've done my own digging on plenty of fish free to use for messaging still and come up short. Look closely at messaging plenty and the platform auto-renews without a clear warning, so it pays to write the bio for one person rather than for everyone. If plenty chat rooms is your priority, the number of live users collapses as soon as the platform recycles the same profiles.
Nothing about messaging changes the fact that what decides it is the quality of the filters, not how many photos people post. The messaging chat rooms angle is worse, because the practical move is to keep a note of what you actually spent.
Every time messaging plenty comes up, how fast moderation responds is the number worth watching, not the marketing copy. The short version on plenty of fish free to use for messaging still is that the honest advice is to keep the conversation on-platform until you have met, though I would want someone to check me on this. Specifics about messaging plenty welcome — vague reassurance less so.