OPENSEA 
Nobody noticed the elephant (ship) in the china shop.
The market is currently quite empty of solid projects to work on, and it’s very strange to me that the top-1 NFT marketplace, which "started" (yes, it’s been two months already) a points campaign, has so little hype, considering the costs for one box are minimal (~$10) and the actions are straightforward.
---So, in my opinion, if you’re looking for a place to invest some spare cash, the ship is the best project right now.

----------------------What to Do Now?----------------------

Cross-chain mints (Influencers push their NFT collections across all networks here. I’m too lazy, so just open the activity tab, sort by mint, and pick any mints you want—obviously, the cheapest ones).
Cross-chain purchases - just find the most cheap collections and buy them)
Sweeps (You need to buy 5+ NFTs at once from a single collection. Go for cheap, verified collections. There was a hint about this action in their Twitter).
Sweep process:
Go to the secondary market page of a collection on OpenSea. Use verified collections like Axie Material (Ronin) or Get Based (Base) with a floor of $0.03–0.10.
At the bottom left, there’s a slider—select 5–10 NFTs (ensure the total cost is $0.50–1), do this across multiple networks, and confirm the transaction.

Other activities (Swaps between networks, creating + minting your own collection, deals (questionable, but go to the leaderboard, check someone’s profile, and make lowball offers on their NFTs).
-------------------------------------------------------------------------
In the end, we have a highly promising venture where you could earn enough for a trip to Saint-Tropez. Even if it doesn’t pan out, the costs are minimal, and we’re all here for fun and education, right?

--------------------------Some Metrics----------------------------
Valuation: $13.3B in January 2022, backed by a16z, Paradigm, Coatue.
Potential airdrop: $500M–$1B, based on the Magic Eden precedent ($650M) and OpenSea’s much higher revenue. Even if it’s less, the ROI will still be significant.
Stats: According to some source from Kenya, OpenSea had 162,000 active users in April, accounting for 52% of the total NFT market, while Magic Eden holds 27% with 78,000 users.
Only 50,000 people received the last Ronin box—that’s incredibly low, don’t you think?
Any risks? None really. The only things that might raise concerns are that a few boxes have already been distributed (the campaign’s been running for ~2 months), but given how some people are farming XP, this isn’t a big issue. During the Ronin campaign, I averaged 500 XP per account, while I saw numbers around 100–300 XP in chats.