Matic is not an L2 though, it is a side chain. The reason L2s like optimism are exciting is because they inherit the security of ethereum mainnet. (matic has its own consensus mechanisms).
Optimism also isn't rent seeking with their own coin. All gas is still paid in ETH.
I would call L2 coins rent seekers. Reducing gas,increasing thruput among other things
Exactly, it's a money grab. Optimism doesn't have a coin and have no plans to create one. ETH is be the only way to pay for gas on their rollup just as is the case on L1.
sorry, typo. I don't view matic as rent seekers. The opposite of your view.