For example, not everyone can buy a master node.
And getting a percentage from a certain amount of coins is better.
Correct, all right and beautiful what you say but then why do not you go in the chat of Dash and ask to lower the limit of coin per masternode: 1000 are too many and not all have 20Btc to put on a node and have free coins; or could you ask G. Maxwell to change the Bitcoin pow in the most profitable Pos?
With prices down 12 months, if you believe in the project and the Bitsend team you will not have problems putting up a knot, because today is much cheaper, cheaper and more profitable than 12 months ago