At the morning I got some blocks (very close to statistically expected). All of them rejected, because "network did not receive them"
I'm also a small miner and I enjoy being part of the SPR network. Of course, everyone is waiting on Service Nodes.
One thing I wanted to say: I doubt there are 4 whale miners only. Don't judge SPR mining on an overnight adventure. Let it run uninterrupted for a week, a month, a few months, you will see accumulation. The network hash rates go up and down so if you stay plugged in, you will receive rewards unexpectedly when network hash rates dip and you're still mining. Of course this will change as soon as the hash rate jumps to a few GH, but right now it's a good time to solo mine.
About the rejected blocks: I never had them so I couldn't answer the reason why you have those. And yes, I am on SPR just because they resist the P&D pool audience. This is not a coin to simply dump when you need money, it's an investment in innovative technology (when georgem completes the Service Nodes) and stay with it to support growth and expansion.
Simply stay with it is my suggestion!