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I am only at 36k RP with 0 referrals. Tried in the past to also convert these for roll bonus when I had a lot of time but nowadays I just keep on collecting RP.
I just try to be more active by placing more bets on sports and the wheel of fortune also gave me already a couple of RP (over 5k).
It will take a long time to reach 100k, but I have patience 
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At the time you reach 100k, RP 100k sats can be worth over $100. I wish that happens to you, and to all of us!

As of me, I keep exchanging my RPs for extra lottery tickets per free roll, for the past 4 weeks or so. My chances are better than usually

but still small, so no winnings so far. We'll see how it turns out: will I win more than 100k sats one day with this strategy?