Question:

There is a 500btc limit so if I donate 1 btc will I get 1/500th of the available 19.5 million ebitz coins?

Also how will the ebtiz coins be distributed to me?

PS PoS chains can be broken if any single individual owns >51% of coin supply.

251 btc is nothing to certain BTC whales so the real question is how will you prevent this from happening?