there is only ignorance
It is not, Just name the Data structure that do that? Just the name, you don need to reveal anything else. If that is a bloom filter what is the false positive rate?
If it is a loseless compression system just name it.
If you can't name it, then I will name it BULLSHIT
Do you mean Megabytes (MB) or Mega bits (mb) ?
>>> (8* 4 * 2**20) / (30 * 10**6)
1.1184810666666667
If you divide the number of bits in 4 MB (8* 4 * 2**20) between 30 million (30 * 10**6) you get 1.11 bits per item, if that is not suspicious i don't jnow what it is.
A full publickey need at least 257 bits to be stored without lose of data.
Why don't you put the money in an admin you like so you can see the magic.
You have nothing to lose.