On Purepool, Licht will need to answer. I run the pool.biblepay.org which is the other heat mining website.
There is no maximum limit to heat mining PCs, but remember we require a distinct CPID to solve each of the (5 block lookback solutions), so I feel you are dealing with diminishing returns if you point a lot of power at POBH (POW). Your better off pointing them at PODC if you can gather the stake amount.
Thank you bible_pay. I will try to buy BBP on the exchange for the stake but I need to convince my parents first.

They only accepted to give me the spare PCs for my personal use.

How can I contact Licht?
And another stupid question. How can I vote? I don't understand very well the proposal posted above but I would like to know for the future.
Licht doesnt like e-mails, so the only way I know is to PM "lichtsucher" or post something here.
On the governance voting, the easiest way to get started is to log into pool.biblepay.org, navigate to Governance | Proposal List, and right click on the one you want to vote on and copy the command to the clipboard. However you must have a Sanctuary (thats our version of masternode) to actually vote. But either way its an interesting read:
How to Submit Budget Proposal
https://wiki.biblepay.org/Create_Sanctuary_2#SUBMIT_PROPOSALhttps://www.reddit.com/r/BiblePay/comments/7jbcfj/how_to_submit_budget_proposal/Understanding the Dash Budget System:
https://docs.dash.org/en/latest/governance/understanding.htmlOur whitepaper:
https://pool.biblepay.org/Docs/BiblePay_White_Paper.pdf All Glory to Yeshua Hamashiach.