Recent work in CHI and CSCW has devoted increasing attention to how the design of network hospitality platforms shapes user experiences and relational outcomes. In this article, I interrogate how different risk factors emerge based on the type of exchanges these platforms facilitate. To do so, I juxtapose two prominent network hospitality platforms: one facilitating negotiated exchange (i.e., Airbnb) with another facilitating reciprocal exchange (i.e., Couchsurfing) between users. Homing in on sexual risk, an underexplored form of platform danger, and drawing on interviews with 40 female dual-platform users, I argue that the provision of binding negotiated exchange and institutional safeguards by Airbnb reduces risk through three mechanisms: casting initial guest-host relation into a buyer-seller arrangement, stabilizing interactional scripts, and formalizing sexual violence recourse. Conversely, Couchsurfing's reciprocal exchange and lack of safeguards increase sexual precarity for users both on- and off-platform. This study demonstrates how platforms with strong prosocial motivations can jeopardize sociality and concludes with implications for designs that better protect vulnerable user populations.

翻译：近期CHI与CSCW领域的研究日益关注网络接待平台的设计如何塑造用户体验与关系结果。本文通过探究不同类型交换方式所催生的风险因子差异，对两大主流网络接待平台进行对比分析：一个促成协商性交换（即Airbnb），另一个促成互惠性交换（即Couchsurfing）用户间关系。聚焦于性风险这一尚待深入探索的平台危险形态，并基于对40名女性双平台用户的访谈，笔者论证Airbnb通过提供约束性协商交换与制度性保障，通过三种机制降低风险：将初始主客关系塑造为买卖双方关系、稳定互动脚本、以及规范化性暴力申诉程序。反之，Couchsurfing的互惠交换机制与保障缺失加剧了用户在平台内外面临的性不稳定性。本研究揭示具有强烈亲社会动机的平台可能危及社交安全，最终为设计更有效保护弱势用户群体的方案提供启示。