At first, I'm also here to earn and to learn. Before bounty provide a bigger reward  in any campaigns, can be in signature, content or social media's. This forum is also a good source to learn and to get ideas on where to invest and if that project is worth investing.
Now I also enjoy sharing my advocacy or profession not totally in terms of cryptocurrencies but related to finances and insurances. It's nice I was able to do it here in the forum with others who are also thinking of availing or in doubt of insurances.

Honestly, bounty campaign isn't a waste of time if you know the right bounty to take part in. I've seen friends who earn from bounties here.
And so far this forum is meant for different purposes, some can register for a purpose and focus on it. So far it's not forbidden on the  forum. It depends on one's way of life.
And  the way you think bounty program is, is not what it really is. It's a way to promote a project with good and quality posts and comments. And earn with it.
When you post a good post and a user see the sticker or signature of the project you use. Your post can actually take their attention.

Are we all guilty if we make money from this forum ?
I dont think any of us is guilty of making money on this forum if it is accompanied by active contribution to the forum and its user.

Signature campaign are not meant for spammer, low-quality poster and troll, as signature campaign are aimed at those with good post quality. I am sure about that. Even if you are a quality poster when you are accepted into one of the campaign and suddenly the quality of your post drop and is just spreading spam, you will likely be excluded from the campaign you are promoting.

Many opportunities are still being given to low quality poster in bounty campaign because manager do not set good standard in selecting participant for various reason. Insufficient funding from investor is the reason why they need to spread the word about the project in more forum even though they employ low quality poster.

I chose both and that is gaining knowledge and making money. As long as I am not a spammer and a troll then I dont think it will be a problem because I am not here for money alone.

Expecting to earn money from this forum is not a crime, if you are sure you are qualified to participate in the signature campaign just do it as long as you aren't spamming, the bounties is a little bit different, even though nowadays many BMs have started to give strict rules but it is difficult to apply in some types bounty like social media, for contests you have to create authentic content otherwise you will same with spammer just focus to earn money not the quality.

I think for now getting money is quite difficult.  I took just one example following the bounty.  To be able to participate in the bounty, you must at least have a fairly high forum ranking, be it content or signture.  For the newbie rank, at most, you can only participate in the social media campaign.  Even then, to get a good project, you must be very careful because the project can be said to be a scam because it cannot be exchanged or does not even pay enough participants.

Nowadays there are a lot of newcomers right here are going to explore and making a thread and usually ask like these

"How can we earn with bitcointalk?"

"How to earn bitcoin right here?"

"Can someone help me to earn money here"

Those are the common things asking by the newbies and again and again, we are answering those questions and this is a good thing created by the OP as an introduction to them what are the different ways to learn and earn right here on our forum.

Only one thing here in my mind when i joined here, to earn money for my family.
I tried everything to earn like joining signature, won in a contest everything i did in exchange for money.

Many people have come here because they have heard that you can earn a lot quickly. Of course, there are chances for a big profit by hitting the bounty of the project that will fly to the moon ... unfortunately, hardly anyone mentions that hitting such bounty is a chance of one in thousands ...
But there is another possibility - I'm surprised no one has mentioned it directly yet. Devote hundreds of hours of work, become a great poster, increase your knowledge, help others, forget about earning for a few months, just focus on the high level of your posts and then wait for the right moment which is ......
Free slot in the chipmixer campaign, if you are able to break down the competition, you will get the holy grail of this forum and wear a chipmixer shirt that will provide you with a decent salary for your posting.
You will say it is impossible - if you are determined enough and spend enough time it is possible. I tried several times and even reached the semi-finals once, but the truth is that the competitors were much better posters than me, so I have no regrets. But for months on BTT, I saw few users who, within a few months from Jr. Member rank got promoted to Hero and went to this campaign so I can tell it's really possible

The only way to earn from this platform is by selling your service here. There is a lot of traffic on this forum and you can gain a lot business if you have something good to offer. Similarly if you are a crypto related company, then also you can advertise and gain customers from here.
The rest of the ways like Signature or bounty campaigns are just temporary way of earning a little pocket money.