I really like memo.cash, because we're actually using BCH units here - nobody uses exchange rate calculated fractions - nobody cares about the rate for tips of 5k 10k or 100k satoshis
And a post always costs between 250 and 500 satoshis (depending on length) regardless of the price on the exchanges.
Very stable prices.
This also forecasts that BCH will need to be divided even more or to deploy L2 for micro tx.
Cryptocurrency as a unit of account is rare (unfortunately) - pricing items in crypto could result in a loss in terms of fiat money - if it's done incorrectly
