Ideamarket Review 2026: Paying to Rate Ideas on Arbitrum

Ideamarket is an on-chain platform on Arbitrum that tries to replace the role of media institutions as arbiters of credibility with a public market. Users post ideas, others rate them, and the author earns fees from ratings. The homepage tagline is 'Credibility without institutions'.

DefiLlama lists it under Derivatives with a TVL of about $143,435, flat over seven days, with the IMO token, two audits and a listing date of December 2021. The docs say that at its September 2022 launch on Arbitrum it had fewer than 100 daily users, and describe a token rewards promo to encourage ratings.

The docs also cover use cases such as DeSci credibility, DAO activism, prediction markets for public opinion and a global knowledge graph. These are largely described as ideas and integrations in progress, so readers should separate the working post-and-rate mechanism from the broader vision.

Ideamarket lets users create posts and rate them. Each post has an owner, the author by default. Anyone who rates a post pays a small fee in ETH to that owner, so an author who attracts enough ratings earns more than the cost of posting. Posts can be sold, and the buyer then receives the future rating fees.

Because posts and ratings are recorded on-chain, the data can be filtered by wallet characteristics, such as which NFTs a rater holds. The project argues this lets people check who rated an idea highly early on, and could be used to settle prediction markets about public opinion.

IMO is a separate layer for visibility. Users stake IMO on other users, and posts on the homepage are ordered by the total IMO staked on everyone who rated them. The docs say staking carries no risk of loss. The docs also describe the project as built on bonding curves and a set of contracts for token creation, exchange and vaults.

The docs state that creating a post costs 0.001 ETH (about $1.30 at the time of writing), paid to the Ideamarket treasury. Rating a post costs 0.001 ETH, paid to the post owner. The docs say Arbitrum gas is closer to $0.20 even when MetaMask estimates about $20.

Fees for buying IMO on SushiSwap or for selling and unstaking are not detailed publicly. Users would see those costs in the app or the swap interface before confirming.

The docs reference Quantstamp audits of the smart contracts and name the developers who wrote them, and DefiLlama lists two audits. Audit scope, findings and any later code changes are not given publicly. Smart-contract risk and the risk of losing the ETH paid in fees still apply.

The platform is non-custodial in the sense that you use your own wallet on Arbitrum, though staked IMO sits in contracts. The docs claim staking carries no risk of loss, but IMO's market price can still change. The docs include Terms of Service, and public sources say nothing about a licence or regulated status. Check the terms and your local rules before using it.

Ideamarket is for crypto-literate users interested in social experiments, opinion markets, DeSci or on-chain reputation, and for builders who want rating data to work with. It is not suited to people looking for dependable income or a trustworthy fact-checking service.