A lot depends on how many transactions this causes.
I did a long thread that is a sticky that explains what a large pool such as antpool can do to increase transaction fees.
edit : thread link.
https://bitcointalk.org/index.php?topic=2634505.msg26809430#msg26809430The long and short of it is a large pool can whitelist little bullshit transactions with tiny fees to flood the network memory pool.
This causes normal users to have to spend 100 to 300 sats a byte to get our transactions to move.
So I spend 1 btc a day making bullshit transactions
I am antpool I make 20 blocks a day.
These blocks average 1.0 btc in fees due to my flooding the network’s memory pool.
that is 20 btc and I spent 1 btc to do it.
that is a gain of 19 btc.
If I did none of these fees may have been .1 btc a block or 2 btc at no cost.
so 20 btc at a cost of 1 btc
vs 2 btc at a cost of 0 btc
it is obvious flooding the network makes sense.
Lets say when I pay coins back to miners I give 1/2 the fees to them
my flood the memory pool way is 20/2 = 10 - 1 = 9 coins profit.
my do nothing is 2/1 = 1 coin profit.
I am not sure the intention of the guy doing this promo is what I said , but if it looks like a duck ,quacks like a duck and walks like a duck more often then not it is a duck.