Registration and browsing
Open essentially everywhere. A site that will not let you see whether anyone is in your area before paying is asking you to buy something unseen, and there is no good reason for that.
Cost
Nothing online is free without a reason, and the reason matters. On some platforms free users are subsidised by paying ones, which is a normal business. On others, free entry is the first step of a billing funnel. The difference is visible early if you know the shape of it.
The first kind is a platform where registration, browsing and messaging cost nothing because a minority of members pay for convenience features. Your presence has value to the site — a platform with no members converts nobody — so free access is genuinely in its interest. This is how most member-to-member dating and chat sites work.
The second kind is free entry to a conversation with someone who is being paid to have it. The first few messages cost nothing; then a limit appears, or a "private" upgrade, or a verification step. Nothing here is illegal or even hidden, but the free part was never the product.
Telling them apart is mostly about what happens when you do nothing. On the first kind, a conversation that goes quiet stays quiet. On the second, something always arrives to restart it, because a silent conversation earns nothing. That single observation is more reliable than any amount of reading the pricing page.
Open essentially everywhere. A site that will not let you see whether anyone is in your area before paying is asking you to buy something unseen, and there is no good reason for that.
Usually a daily cap on new conversations rather than a hard block. The cap is what stops the platform being unusable for the people receiving messages, so it is one of the more defensible paid upgrades.
Once a thread is open, replies are normally unmetered on member-to-member platforms. Per-message billing inside an existing conversation is a strong sign the other side is working.
One rule covers the whole category: if the card comes out before you know whether anyone is within range of you, the order is wrong. Establish that there are people first — that part is free everywhere worth using.
On member-to-member platforms, yes — indefinitely, if the free limits suit how you use it. On paid-operator platforms, no, because the paid conversation is the product.
For account recovery and to make throwaway registration slightly harder. Using an address you keep separate from your main one is sensible practice and costs nothing.
Not inherently. Paying changes your feature set, not who is on the other side of a conversation. The same checks apply either way.
Usually that the member base is thin, or that a lot of the traffic is automated. Both are visible within ten minutes of looking, which is why looking first is free everywhere sensible.
No card to register, no card to browse, and nobody being paid to answer you.
Start free, no card