Suppose l have a product or a service. Meta ad is such a system that you can create a nice information piece for yourself, which you can share with others. I want something similar. But devoid of Meta !!

I think you are asking for two different things. Or maybe one impossible combination of things.

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You want to network a (presumably paid) product or service to people. You want to “create a nice information piece for yourself,” and for that to be shown to other users to promote your service.

…And you can already do this on the Fediverse. Or HackerNews. Or wherever.

If you have a nice product/service, post it in the appropriate community/network, and it will take off! It will get exposed to users, it will get shared/reposted and you will get engagement. If it doesn’t, that’s because Fediverse users chose not to engage or boost it. That’s how FOSS and community works: with user consent, and little engagement manipulation.

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But that is not what Meta provides.

Meta provides an ad network, and you pay them to boost engagement. Meta provides a service to boost the attention of your product/service beyond what it would achieve “organically,” and laser target it to users who are most likely to engage with it.

You cannot replicate that without replicating most of Meta. And you certainly can’t try and even hope to compete with MEta.

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So if you are unhappy with the way promotion on the Fediverse and similar platform… well, that’s the tradeoff. And I still do not understand your proposal to replicate that without essentially replicating an Meta-like ad service. You can’t follow FOSS, communal principles and pay to boost engagement artifically like that.