This guy paid the price of a coffee to inscribe the Quran on the luckeshitcoin chain, so
a) Is the Quran still there and will be in all eternity?
b) How much will it cost to inscribe that on Bitcoin
How much it would cost on spamcoin is not really relevent. Whatever it would cost for the same size monetary space, it's likely to cost 5x less for spam.
But on either chain, the miner fees are a marginal cost. The real cost is the enormous amount of marketing required to make people want to buy that garbage.
You can't build that kind of business on XBT. But you sure can on spamcoin. Don't worry, core will reject them if anyone tries to implement filters that might bother your business.
Like I said, we suffered a spam attack. What we didn't do is sit in a circle jerk and tell ourselves filters are censorship, filters don't work, and we don't know what is spam anyways.
When core rejected ordinal filters, that was a signal to all of the spammers elsewhere to come on spamcoin and dump their garbage on spamcoin.
Core repeats the message as often as they can: "Welcome spammers, we can't stop you, and even if we could, we shouldn't because that would be censorship?"
This year, we are getting 50% of spam by block size. Next year it will probably be 60-70%.