But the 100ETH cap is per wallet address, individuals/whales can just use multiple addresses, right?

I think what people are saying is that the difficulty bomb should make prices go higher, not that Metropolis should per se.

By my calculations we should hit block 4m around Sunday evening at which point we should see a spike to ~30 seconds per block, right?

By my calculations ETH-SIA is narrowly more profitable for my 1070 rig.

What have you set the -dcri to in Claymore? I've got mine on 50 and I'm getting 28.5 MH/s for ETH and 475 MH/s for SIA. I tried setting it to 60 but found ETH dropped to about 27 MH/s whilst SIA only went up to 540 MH/s which wasn't really worth it. How have you clocked your 570s?