Conflux network hashrate is 1.3TH/s, meaning it's equivalent to ~27k 3060s. Eth hashrate is 411TH/s, equivalent to 6.9M 3060 Ti/3070s.
The idea of buying 3060s to mine other alt coins sounds fine now, but none of them have the market cap to absorb any real capacity of 3060s. You'll probably ultimately see their profitability using a 3060 level out to about what the profitability is mining Eth with a 3060.
That being said, if you're looking at a 3060 at MSRP of $330 you're looking at ballpark of $2400 pre-tax to set up a 6 card rig. Even gimped it would still be pulling in ~$500/month based on the last 7 day average before power costs. That's still very good especially given how well the 3060 bracket will hold up their used value. Miners buying 3060s in bulk will still be very financially viable even if the hashrate limit isn't fixed, so I don't expect 3060 stock to be much better than the rest of Ampere.
For the CMP cards, Nvidia could have a case for them going forward if they provide proper driver support. Gamers might not be able to buy them used, but if you can use them to run general purpose GPGPU code and accelerate rendering, do ML training, etc there could be a potential resell market that would make them more attractive to miners. Outside that, the CMP cards will need to be significantly cheaper than an equivalent GeForce card to make sense and I would be shocked if Nvidia priced them that way.