My advice is to do your own proper research on those offering you help. If I may ask, what kind of offer are they making to you? Is it to promote your NFT for you to get quick buyers, or is it for you to hand it over to them for them to help you sell it? Depending on the approach at which they write you, sometimes it might be easier to identify their real intention.
They want to promote my nFT collection, they dont want me to handover anything, exept for the payment for their service, some want it prepayd some not. Actually i tried to find out if all of these followers likes, retweets and other interactions are just bought by them ore if this are real interactions from real humans. But thats almost impossible to find out. But anyway the impressions for some of my pics rose significant since these guys are following me. Some went up from 6 to 20 others from 6 to 100
Do you may have some tips i could use to promote my collection without using social media are there any other alternatives ?
Why don't you want to use social media to promote your project? Anyway, I think you should create your website and publish content such as blogs and articles on it. Also, you can utilize SEO to drive organic traffic to your website or your Opensea Profile.
I'm wondering why don't you want to use social media. Using it doesn't mean that you should hire influencers. You can do it for free. However, that'll be a slow process of getting potential buyers.
I believe the crux of the matter is whether you would prefer to invest more money in marketing your products (NFT Collections) or handle all the marketing efforts yourself.