Again:

raiblockscommunity.net miner is distributing private funds.
It means we must buy XRB before distribute them. It means we are not getting XRB for free like when the raiblocks faucet was running (now is closed forever because all remaining funds have been burned).
It won't use captcha or advertising because fight bots and pools was too hard and we don't want to run in the same troubles again for the moment.

raiblockscommunity.net mixer is already developed but we are waiting for some factors to release it.