If someone makes 20 posts in a day, no matter who they are, they are clearly only thinking of their wallet and not anything else. If you are given a pass, then everyone will expect 1, which is how corruption starts.
This forum is accessible via mobile or desktop which means a person can login at anytime and make a post or 2. If you are away from the forum for 5 days and have 2 days left to get your posts in, the best thing you can do is take the rest of the posting period off. 1 person is no better than another, just more reputable in cases. I'm ok with someone posting sorta fast if it's on topic, decent quality, and not everytime they login, but 20 in a day is a no no matter who it is.
Unless there is good reason, favouritism or actions perceived to be favouritism by a campaign manager will probably upset the balance within the campaign group therefore it is not a good idea.
In your capacity as a campaign manager you would have to deal with the matter if some thing like that ever happened in one of your campaigns. You would probably receive universal support if the participant complained simply because they were your rules and the participants breached them, if they enrol they have to adhere to the rules you set regardless of who the member is.
If you are away from the forum for 5 days and have 2 days left to get your posts in, the best thing you can do is take the rest of the posting period off.
This statement surprises me, and it goes against this:
4. no need to change posting habits.
If you use the forum as a forum instead of an ATM, there's no need to "take 2 days off" if you don't reach your minimum to be paid. You can still just post what you want, because you like it even without payment. I'd say that's the kind of people you want to have in your campaign.
You are in a very privileged position of getting a phenomenal amount of money every week (0.015 BTC) I believe regardless of how many posts you make just for wearing an avatar and you have been doing it for
around 5 years. It is hard to tell whether you use the forum as a forum or as an ATM yourself because we do not know whether you would be posting here and in which numbers if the financial incentive was removed. The same applies to the vast majority of over 99.99% of us here.
How many members receive 0.015 BTC every week for wearing an avatar without a quota to meet? When BTC was priced at $100,000 that equated to $1500 for the avatar you wear therefore you might not be best placed to understand why some members make ends meet or those that earn more from $50 a week campaigns than they do in their real daily jobs. If you have that understanding then that is great but either way I think we all agree burst posting should not be happening. Having said that, without the financial benefit attached to campaigns, the forum would benefit first by having all the farmed and most alt-accounts abandon it. After that, almost everybody else would leave except those that have technical expertise and just a few others. In many ways, this forum is already an ATM for the majority that use it.
Maybe, the greedy and corrupt have created a huge number of farmed accounts and need time to catch up all of their accounts with their quotas. Maybe someone with a couple of alt-accounts needs to do the same for the same reason or to top up their weekly income either for greed or to support their family. Or maybe someone that has a 7 day a week job earning a couple of hundred USD$ in a land where poverty and corruption is rife was ill and could not either get to work (for which they will not be paid) and they could not meet their quota therefore tried to spam their way in to meeting it when they had just a day or two in hand.
Without doubt many members do use the forum as an ATM as they have already decided that having an account automatically means having the right to enrol on campaigns, hence the number of farmed accounts along with the cliques for political purposes. This is when a proportional amount of understanding, compassion or ruthlessness is shown by a competent campaign manager to address the issue and hopefully things will improve (and they have) when it comes to spamming.
It could happen for many reasons but the ATM part has become a reality.