Participants' personal data
Names, phones and photos of participants are personal data (Ley 1581 de 2012). Ask their consent, say what the data is used for and how they can see, correct or delete it.
Children's data has extra protection (art. 7): under-18s take part with a parent's or guardian's consent.
Keep the data only as long as the promotion needs it.
Source: Ley 1581 de 2012 (Función Pública)
Source: Decreto 1377 de 2013 (Función Pública)
Alcohol and minors
Selling alcoholic drinks to minors is prohibited (Ley 124 de 1994, art. 1), so an alcohol promotion is for adults only.
Every ad or promotion of alcoholic drinks must expressly mention that prohibition (art. 3; Decreto 120 de 2010, art. 15). The app adds the line "Prohíbase el expendio de bebidas embriagantes a menores de edad. El exceso de alcohol es perjudicial para la salud." to the terms and the ad line.
Source: Ley 124 de 1994 (Función Pública)
Influencers: say it is advertising
The SIC guide on advertising through influencers (2020) asks that the commercial relationship between the influencer and the advertiser be clear, for example with #Publicidad, also when the influencer is paid in products.
Social networks have their own rules for promotions; follow them as well.
Source: Superintendencia de Industria y Comercio
The lines the app adds
For alcohol, in the terms and at the end of the ad line:
Prohíbase el expendio de bebidas embriagantes a menores de edad. El exceso de alcohol es perjudicial para la salud.
For influencers, at the end of the ad line:
#Publicidad
When a promotion collects personal data, its terms say what the data is used for and how each person can see, correct or delete it (Ley 1581 de 2012).