It’s impossible to estimate what will be your results as it’s different on every campaign. There are a lot of variables like target audience, niche, message, product/service, your content etc.
Someone who’s promoting his Pizza shop won’t have the same results as NFT Project will have.
Someone who’s promoting an NFT and target @nft followers will have different results if he will target @nft.money followers.
Therefore, it’s impossible to build statistics, only after trying different campaigns with A/B testing.