Do you know BSV？
Blocks have no upper limit.

Can blackcoin/blacknet imitate bsv?

open op_return

Allow people to upload anything，File image or txt content。
Make the block chain network of blackcoin/blacknet  a huge content space.
It's twitter, and it's a network hard drive. or bbs

The price is set by the miners.
like 1MB=1BLK/BLN.

People upload data and miners make money.
Let blackcoin/blacknet be used more.