The problem isn't the wallets but that many LNURL providers don't support msats but round to sats or throw an error. So anything below 1 sat will indeed get rejected. Examples are Alby, WoS or LNbits ([even phoenixd doesn't support msats for their REST API](https://phoenix.acinq.co/server/api#create-bolt11-invoice)). And lightning addresses are very popular for receiving.

If you run your own LN node yes, it should be just fine to receive it.
But I've seen many stackers here using WoS or other custodial shit wallets that will reject under 1 sat.

DarthCoin

1sat is 1000msats; a 1sat payment does not trigger any issues with msats on any wallet I've ever seen, and I don't see how it could. 

petertodd

Taft

AskSN

How does it make sense to zap a post or comment with just 1 sat?

1 sat zap is stupid and with the new p2p zapping is creating even more friction and trouble because not all wallet apps are designed to deal with msats, even that over LN mstas is the unit used.

I will say it again: separate upvotes from zapping sats.