Well, not really, and the investment might be worthwhile. Paid marketing campaigns can vary in cost depending on the platform, budget, and objectives of the campaign.
However, the more you invest in a campaign, the better the results you can expect from it. Nonetheless, it is possible to run successful campaigns on a limited budget, if you are strategic about your marketing approach. For instance, social media ads like Facebook, Twitter, and LinkedIn advertisements are not that costly and provide remarkable results.