Is there a platform like Mirror/Paragraph, but instead of "collect," people can "sign" (as in, a manifesto)?

unlocking potential ▶︎✕ @venturetothex, democratizing innovation :// /ottp, proliferating play @playgotchi, catalyzing creativity ⛊ @defy | nf.td/ting

Interesting. What's the motivation? Gathering on-chain support around something?

cma.xyz. Founder /paragraph, ceo /mirror, previously at Google & Coinbase 

I was thinking that "collect" is passive and "sign" is a more active sentiment.

One example:
1) Sign a manifesto (or community values).
2) Get airdropped a token or allowlisted.
3) Token unlocks access to future content.
4) Track what you've signed (like collected).