Facebook Members services add members to a group, channel, community or server on Facebook. The count is tied to that space, so the link you paste decides where members land. Listings describe the account quality tier, any country or language targeting, start time, daily speed, minimum and maximum order size, refill terms and, on some platforms, how long membership is guaranteed to last.
Whether a space is public or private changes what you can order. Many services need a publicly joinable group or channel, while a few support private invite links. Because members can leave at any time, refill and drop terms matter more here than in many other categories. Read them before ordering, and keep your invite link valid until the order completes.
Check public or private support
Most member services need a space that anyone can join, and some state that private ones are not supported. If your community is private or needs approval to join, look for a listing that explicitly accepts private invite links, or open it for the delivery period. Approval queues, join questions and verification steps can stall an order.
Use a link that will not expire
Invite links on some platforms expire or have a use limit. Create a link without an expiry date and without a member cap before ordering, and do not revoke it until delivery completes. If the link stops working, remaining members cannot join, and a new link counts as a different target that the running order will not follow.
Look at drop and refill terms
Members can leave or be removed, so listings show a refill period such as 7, 30 or 90 days, sometimes with a separate no drop window. Refill means topping up members who leave during that period at no charge, not a refund. For long-lived communities, a longer refill or guarantee period is usually worth the higher price.
Choose targeting that fits your community
Some services offer members by country or language, or tiers such as premium accounts where the platform has them. A community that posts in one language with members who appear to come from elsewhere can look inconsistent. Pick the targeting that matches your audience on Facebook and the language you actually post in.
Grow at a pace your space can carry
A group that jumps by thousands in an hour while posting little can look unusual to visitors. Where drip-feed is available, spread members across days and keep posting so new arrivals see activity. Also check any automatic moderation or anti-spam settings, which may remove new members in bulk and undo part of a delivery.