Proportional Campaigns

A proportional campaign distributes a fixed pot of tokens among all participants by their share of total stake. The campaign owner pre-pays the entire budget upfront, and each participant's share changes depending on how many others join. More participants means each earns less, but the owner's cost never changes.

Proportional campaigns are ideal for validators with a fixed marketing budget who want to attract participants.

How it works

Instead of setting a rate, the owner sets a budget and a window. The campaign converts this into a constant emission:

emission = budget / window duration

For a 10,000 USDC pot over 30 days, that's ~333 USDC/day. Those 333 USDC/day aren't per unit of stake. They're the whole pot's daily drip, split across all participants by share. Twice the participants means half the share each. The owner's cost remains unchanged.

Funding model

The owner pre-pays the entire pot up front by transfering the full budget (plus any protocol fee) into the vault. From then on:

• The cost is capped and known. It can never exceed the pot.
• What changes is each participant's share: more stake joining dilutes the per-unit yield.
• No top-ups needed on growth. Where a fixed campaign owner must top up when stake increases, here growth just reduces each share.

Early-mover advantage

The pot rewards being early, because early shares are bigger. Consider two participants, each staking 1,000 SOL to a campaign that distributes 333 USDC/day with total stake growing from 10,000 to 30,000:

Participant	Stakes	Share over time	Earns
Alice	From day 0, the whole month	10% then 5% then 3.3%	~500 USDC
Bob	Only from day 15	3.3%	~167 USDC

Same stake, same token. Alice earns 3x Bob, purely for backing the target before more participants joined in.

Rolling horizon

Like fixed campaigns, a proportional campaign can be extended. The difference is in how funding works:

• Fixed: the owner tops up the vault before extending, and the campaign re-reserves from the vault.
• Proportional: the new budget is pulled directly from the owner's account. No separate top-up step.

Example: sharing a 10,000 USDC pot

A validator, Acme, wants to attract participants by distributing a fixed marketing budget of 10,000 USDC over a month, split among everyone backing it by share.

Roles

• The Owner (Acme): creates and pre-funds the pot, extends the campaign horizon with a fresh pot.
• The Delegate: reports each participant's SOL backing the Owner.
• Participants: earn a share of the pot and claim rewards whenever they like.

Flow

Step by step

Day 0: The Owner pre-funds the whole pot. The Owner creates a campaign: proportional mode, 30-day window, curve that distributes 10,000 USDC over it. At the same time, the Owner transfers the full 10,000 USDC into the vault. The budget is committed up front.

Days 0-15: Participants arrive, the share shrinks. The delegate reports 10,000 stake and each 1,000 earns ~33.3 USDC/day. Stake increases to 20,000 then 30,000, and the same 333 USDC/day splits more ways: the per-1,000 rate falls to ~16.7 then ~11.1 USDC/day. The Owner sends nothing more.

Days 5-28: Participants earn and claim. Rewards accrue continuously by share. Participants claim their accrued USDC whenever they like. Exits simply stop earning a share. Undistributed budget stays in the vault.

Day 28: The Owner extends the campaign with a fresh pot. The extend pulls another 10,000 USDC from the Owner's account. Participants keep earning across the day-30 boundary without any action.

Day 60: Wind down. The Owner lets the window lapse. Participants claim their final USDC. The Owner pulls back any undistributed budget (the portion that was distributed while no one was backing the target). Then the Owner recovers the rent.

Reclaim timing

For proportional campaigns, unused surplus is only allowed to be reclaimed after the campaign ends. Before that, the pot is committed to current participants. This is different from fixed campaigns, where reclaim is available anytime.