I've taken part in all scroll testnets as well, just because it was free and didn't require much effort, I didn't run node tho, never good with that stuff.
7) Own a Scroll ENS domain
How do you get it?
The Scroll is a big project with this kind of Funding, also I used its many features in the Testnet phase with these two as you have mentioned one of them is sepolia. I did some of its tasks through the Taiko Testnet where scroll Testnet was involved. I can smell something from it because I think it will do a big airdrop and we have to use its official bridges as its tasks are also now on the Layer3.
I have been using it since the start of their Testnets and I had already verified all tasks that were on the Laer3, which could be helpful for a big Airdrop from the Scroll Team. Looking at their funding, I think something big is coming from Scroll. We have to interact as much as we can on its Mainnet even as that was before in Testnet. Using its Native bridge would be juicy.
Not too sure about layer3, galx (although, I agree I claimed scroll nfts using it), taskon — these platforms reward poor compared to tasks involved, and not too many projects use them in their criteria. Happy to be proven wrong tho.