A 2025 Adobe Express survey of 2,000 French adults found that transparency around partnerships was the single most cited trust factor, named by 23% of respondents. Subject-matter expertise (21%), a general sense of sincerity (20%), and a consistent content style (19%) followed closely behind, all within a few points of each other, and separate coverage of the same research highlighted that direct engagement with an audience and actual use of the products being promoted also matter to how trustworthy a creator comes across.
That matters because trust in this space starts from a low baseline. A separate 2023 study by L'Observatoire Cetelem, conducted with Harris Interactive, found that only a third of French consumers trust a product recommendation within a disclosed partnership, barely lower than the 36% who trust one made without any partnership at all. Distrust exists with or without a partnership. What moves the number is a combination of factors close in weight to each other, not any single fix.
Frequency matters less than consistency
A 2022 study by Influence4You on mega-YouTubers found something counterintuitive: creators who do a high volume of brand collaborations, more than 20% of their videos, see almost no difference in views or engagement between sponsored and non-sponsored content. Creators who rarely do partnerships, under 10% of their output, face a more mixed reception specifically when they do post one.
The audience calibrates to what it already expects from a given creator. An occasional partnership from someone who almost never does them reads as a bigger shift than a regular one from someone whose audience already knows what to expect.
How many sponsored posts are too many before an audience loses trust?
There's no fixed number. What the research shows instead is that coherence with the creator's established niche and rhythm matters more than raw frequency. A creator who partners often, but consistently within their established world, keeps audience reception stable. A creator who rarely partners, then does so inconsistently with their usual content, faces the sharpest drop in reception.
What this means in practice
The main risk isn't doing “too many” partnerships in an abstract sense. It's inconsistency, a partnership that doesn't fit the audience's existing sense of who you are, or a sudden shift in frequency without the audience having time to adjust. Predictability protects trust as much as any single tactic does.
Sources
- Presse Agence, “Les Français font-ils confiance aux influenceurs ?” (Adobe Express study, 2025)
- Les Gens d'Internet, “70% des Français doutent de l'honnêteté des influenceurs” (2026, même étude Adobe)
- L'Observatoire Cetelem, “Influenceurs : la crise de confiance ?” (Harris Interactive, 2023)
- Influence4You, “Étude Méga-Youtubeurs” (2022)