Actually, the forum is improving in my opinion. Many people had quit since it became hard to gain easy profit but still, there is a lot of spamming and scamming going on especially in the altcoin section.
To extend on what btcltcdigger said, people tend to spam when they can't get the post requirement even though they may be seniors members with good posts history, you can't expect them to constructively post all the time. Just browse some topic in the beginner section, you will see people answering the same question many times. Though, we can avoid this if bounty managers lower the post requirement or for example cancel the minimum post requirement and impose a maximum so that members don't get forced to complete the requirement. This way, their payment will be proportional to their posts and they don't risk not getting paid.
This is really a great suggestion, but I doubt campaign managers will agree, they need more exposure for the campaign. But imagine without the pressure of achieving the minimum post required, or having lower mimimum post requirement, they can be relaxed in understanding and researching the topic before posting something just because they needed to. They can have more time of research especially when the topic is a little bit difficult to comprehend. This way, the forum will have more constructive post.