Members
Members for a group, where everyone can post. A group counter is a different object from a channel's.
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Services for Telegram
On Telegram a group and a channel are different objects with different counters, and ordering against the wrong one is the mistake worth avoiding. Each service below has its own page with the packages and rates in force today.
Subscribers
Subscribers for a channel, where only admins post. Ordered against the channel's public link.
Post views
The view count Telegram prints under every message in a channel, including older ones.
Reactions
The emoji counts under a message, which read as a response rather than as reach.
Before you choose
Telegram draws a line that other platforms do not. A group is a conversation where everyone can post, and the number on it is members. A channel is a broadcast where only admins post, and the number on it is subscribers. They look similar from the outside and they are not interchangeable: an order placed against a channel link will not move a group counter, and the reverse is equally true.
Check which one you have before ordering. If the people in it can reply in the main feed, it is a group. If they can only read and react, it is a channel.
Post views are the clearest signal on Telegram because the platform prints them under every message in a channel, including old ones. That makes them cumulative rather than a snapshot, and it makes a channel's back catalogue readable at a glance by anyone who scrolls.
Reactions arrived later and sit under the message as emoji with counts. They are the one metric here that reads as a response rather than as reach.
One condition applies across all four: the link has to be public or a permanent invite. A private link that expires cannot receive an order, because there is nothing stable to deliver against.