I'm trying to understand Rootstock a little better, and am still not sure about the mining rewards they mention in their white paper:

RSK uses the DECOR+ block reward sharing scheme to reduce competition and allow miners late switch to the RSK best block. If miners switch their hardware each time a RSK block is found, they compete for a full RSK block reward. If they late switch, and keep mining past block tips, they create uncles and and earn a share of the block reward.

But how does this mesh with the pegged 1:1 exchange rate of BTC to RSK? The people behind Rootstock specifically state that new coins aren't generated, only bought with BTC. Is the block reward the transaction rewards?

Thanks!