Why does an invite say Not eligible?

There’s no limit on how many researchers you invite. An invite doesn’t earn credit when:

• you and they have ever had the same phone or mobile money number,
• they join your own team, or use the same work email domain as you (Gmail and the like don’t count),
• they paid with the same card as you,
• they don’t run a paid study within 12 months of joining, or
• their study paid participants nothing in cash (startup or referral credit doesn’t count).

An account that already existed doesn’t count, and only studies that paid the service charge count. If the checks turned down a real colleague from another company, contact us and we can allow it. We can also undo an invite that breaks the rules; if you already spent its credit, that amount comes off credit you earn later.