Blocksack is similar to EOS,
He should is a platform of apps.
He applied the technology of blockchain,
Let's be on the blockstack , can build your own application.

official said that part of the profit will be paid to the most good apps.
Is an incentive,
but,
Want at the blockstack,
Build your own application,
Is need to pay for BTC or paid with Stacks Token (STX).

Compared with EOS,
it is more simplified,
Easier to use than EOS,
But EOS has already occupied a large market,
So he wants to open out a road,
it is very difficult.