Recently, I've seen everyone competing again with testnet incentives, guessing points, betting whether the mainnet will issue tokens.

I just want to pour some cold water: cross-chain, to put it plainly, is not "just click and go," it's about breaking trust into several pieces and then packaging and sending them out.
Each IBC/message passing requires at least the chain's own consensus, light client/verification logic, relayers not messing around with message transmission, and the other chain not doing fancy things when executing this message;
Switching to various bridges makes it even more exciting, adding multi-signatures/oracles/escrow agents—these are "human components."
Anyway, before I bridge, I first think: who is backing this money?
If I can't figure it out, I won't do it much; I can cut fees, but I can't cut trust costs.
The market never rewards confidence.