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Payments within the lightning network are not countable from the outside
There is no open ledger, which counts the payments made on lightning. Only node operators can count how many paments they are routing on their own node. They don't know what's exactly happening on other nodes. This makes lightning payments practically anonymous, which is a nice side effect. When people start to crunch numbers on how many payments the lightning network is able to handle, forget about them. They don't know because they can't!
Also applies to the routing amounts. Nobody can tell you which amounts are forwarded and which aren't, unless node operators make it public. Spoiler: Most node operators don't do that.
Lightning is NOT a solution for big payments
Bitcoin is already able to handle this. You can send Bitcoins worth millions for a very small fee already, so there is no need to find another solution. Lightning fees are measured by the amount you send and not the tx size. Most big payments will be cheaper on the btc mainchain. Discussions about how big payments can be send over lightning are a non issue.
Still people talk about the problem to send tx worth > 500USD through lightning, which in reality is no problem at all, but it could cost more than sending it on the mainchain.