Space Exploration Technologies Corp (NASDAQ:SPCX) third-quarter results show Starlink had 13.6 million consumer subscribers as of Sept. 30. That's up from 7.2 million a year earlier, an increase of nearly 89%.

But average monthly revenue per consumer subscriber, or ARPU, fell to $69 from $83, down roughly 17%.

That divergence shows up in revenue, too. Consumer revenue climbed 57% year over year to $3.12 billion in the third quarter, trailing subscriber growth by a wide margin.

The numbers do not necessarily point to weakening demand or pricing power. ARPU can change as a service expands into new markets, attracts different types of customers, or changes its pricing mix. SpaceX said subscriber growth in the quarter was driven by developed markets, while management attributed the latest sequential ARPU improvement to favorable customer-mix dynamics.

Still, the gap matters. Starlink is adding customers faster than it is growing consumer revenue, making its subscriber base's composition and spending patterns increasingly important to its financial performance.

The Rebound Investors Should Watch

Starlink's monthly consumer ARPU increased 5% from $66 in the second quarter to $69 in the third.

Consumer revenue also rose 26% sequentially, while the subscriber base added 1.6 million users during the quarter. That combination suggests the latest quarter was stronger than the year-over-year ARPU comparison alone might imply.

Meanwhile, Starlink's broader connectivity business is benefiting from customers beyond households. Enterprise and government revenue increased 91% year over year to $2.13 billion, outpacing consumer revenue growth. SpaceX also reported that it installed Starlink on more than 3,800 aircraft by the end of September.

These higher-growth business lines could become increasingly important as SpaceX expands connectivity services and prepares to use additional spectrum for Starlink Mobile. The company agreed in October to acquire a portfolio of 800 MHz spectrum licenses, with the transaction expected to close in the first half of 2027, subject to regulatory and other customary conditions.

Growth Is Only Half the Story

For investors, the question is not whether Starlink can attract more users. Its latest results suggest it can. The bigger test is whether revenue per customer can stabilize as the network expands and new services reach more markets.

The sequential ARPU recovery is encouraging, but one quarter does not establish a lasting trend.

Investors should watch whether future subscriber additions translate into stronger consumer revenue growth, and whether Starlink can sustain expanding profitability while continuing to invest in capacity.