You [cannot bounty a question on stack Metas][1], only [on MSE][2]. There have been [feature requests][3] to add bounties to stack Metas, but perhaps because scoring of Meta questions and answers does not affect reputation, and because the relationship between promotion and participation would be less direct as a consequence, no action has been taken.

There is always shog9's post offering **[5 crazy tricks that'll get you mega meta attention][4]**.


  [1]: https://meta.stackexchange.com/questions/78264
  [2]: https://meta.stackexchange.com/questions/75866
  [3]: https://meta.stackexchange.com/questions/231215/
  [4]: https://meta.stackoverflow.com/a/263059