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.