If you put it that way, then maybe this idea could backfire? Imagine if a player submitted a suggestion hoping that they were able to get HP for it after they saw someone else get HP for a suggestion. This person's suggestion gets accepted and implemented, but they never received HP. Why? They would ask staff who would probably say, "Oh we implemented your idea because it was nice but we don't think it warrants any HP." Of course this person would think that wasn't fair, then they might be hesitant to submit any future suggestions if they think suggestions have to be liked by staff. Of course this just hypothetical and to be honest I'm sure people who submit suggestions would be happier to see that their suggestion was implemented and likely see the HP as an added bonus.
With Bug Reports, I think the reason they give out HP for a report is to encourage other players, who do find bugs, on the server so they could report them instead of hiding them and potentially abuse the bug.
Anyway, I think this idea is nice but I think there has to be some clarification on how HP is awarded like just giving AC to every accepted Suggestion even if denied suggestions have quality ideas in them? Then again, I think the actual reward is getting the idea implemented into the server and I wouldn't need HP after that.