When people earn BTC from sig campaigns, they spend some of them mostly in gambling sites, some even save then spend them in cloud mining contracts (don't know why, most of those don't get you a ROI), others go to the market place and trade them for cash and the rest do altcoin trades. That's overall good as BTC changes hands a lot.
You do realize that the useless content that is produced by them is the reason for which people with actual knowledge regarding Bitcoin stay away from this forum? I couldn't care less about the few bucks that these spammers make and what they do with it. There are campaigns that do not care about this problem (e.g. BitMixer); thus the need to punish services that endorse spam.
But what good will that bring? It will kill the small economy we have going on here.
Yes, it will bring a lot of good and no, it won't kill the economy. The people that do trades of value are usually not signature spammers.
Second is that since here is a forum with different sections and different topics, many people may like to talk with each other about things that cannot be valuable in view of others but you cannot stop them.
You're wrong: We can and we will stop you. We are just debating how exactly it should be done.
For example many may like to talk about if they have 10$ it is better to buy it or invest it
Go into some chat-room and talk about garbage like that there.
Third is that even people who are only spamming can be fine for forum and if they leave here the forum may lose a big part of its users and its popularity.
No, you are not fine for the forum. If you leave here, nothing of value will be lost. Posts like that one are exactly what I'm talking about (I couldn't even understand the rest of it).
Indeed. It was difficult the extrapolate the meaning behind the post.