# zkAsk: Anonymous participation in AMA sessions (Based on Semaphore)

**URL:** <https://talk.harmony.one/t/zkask-anonymous-participation-in-ama-sessions-based-on-semaphore/18420>\
**Category:** zkDAO\
**Created:** [May 12, 2022, 7:16am UTC](https://talk.harmony.one/t/zkask-anonymous-participation-in-ama-sessions-based-on-semaphore/18420 "2022-05-12T07:16:36Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![AleksandarHadzibabic](https://yyz1.discourse-cdn.com/flex035/user_avatar/talk.harmony.one/aleksandarhadzibabic/32/10081_2.png) [@AleksandarHadzibabic](https://talk.harmony.one/u/AleksandarHadzibabic)\
**Post date:** [May 29, 2022, 10:23am UTC](https://talk.harmony.one/t/zkask-anonymous-participation-in-ama-sessions-based-on-semaphore/18420/9 "2022-05-29T10:23:45Z")

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How does posting a question work? Who pays for the gas fees?

My understanding is that one pre-determined address pays for all the gas fees for question posting functionality. If this is the case, can we just brute-force it, by posting a lot of questions? Then contract will have no more tokens and the app would be broken.

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