Sign up for T-Mobile Fiber 2 Gig and get $100 back, plus a month included

This reads as a cheap customer-acquisition subsidy, not evidence of durable demand. The economic question is whether the promo raises lifetime value per sub more than it lifts CAC; if the answer is no, the headline is just an accounting-timing event with limited equity impact. For the payment rail, the prepaid card is too small and too delayed to matter for MA beyond trivial incremental spend at redemption.

The more interesting second-order effect is competitive pressure on cable broadband in overbuilt markets. If TSTS is using free-install / first-month-free mechanics to reduce switching friction, the real loser is likely CMCSA/CHTR’s retention economics, because cable must match with higher discounts to defend share, which can quietly compress ARPU and margins over 1-3 quarters. That said, one promo does not make a trend; broadband moves on coverage quality, install speed, and churn cohorts, not marketing copy.

Catalyst path is simple: watch net adds, early-life churn, and whether the promotion is still needed after the 180-day clawback window. If take rates normalize only while subsidies are active, then the structural outcome is margin dilution, not share gain. Contrarian view: the market may overread this as a positive for TSTS while underestimating that the benefit is mostly pull-forward demand and that MA’s role is economically immaterial.