Why is intercom subscription NOT FREE in APR Condominiums?

SHORT ANSWER:
Because of contemporary market conditions and business dynamics of telecom industry.


DETAILED ANSWER:

A decade ago all networks were copper based and  builder use to provide ONE copper network in any property which could be used by few *incumbent operators in market like A, B to give Broadband access (DSL), landline and Intercom/Centrex. The operators would give centrex/intercom feature free but expect you to mandatory subscribe to their revenue making landline or Broadband service so as to recover the investment made for PBX or Centrex switch. At-least they would demand an X% of residents to mandatory subscribe to landline or Broadband or else they would demand some monthly tariff or even installation cost., if they have not recovered their CAPEX.

In today's the times the situation changed drastically

1. Their are many new operators in the market who have broken the monopoly or duopoly of incumbents. They are constantly innovating service packages and tariffs are declining day by day due to competition. 
2. Broadband speeds have improved  to such an extent (100 mbps - 1 Gbps) that its not possible to meet them with Copper networks and requires Fiber to the Home (FTTx) technologies. Unfortunately FTTx infrastructure overall is more expensive than copper.
3. No operator or builder is interested therefore in investiung in copper networks ands they cannot monetize it enough and recover their investment in reasonable time frame. 
4. No user likes to submit to a monopoly of any one provider for broadband, landline or TV. He wants choice
5. Association therefore also cannot agree to single or dual vendor monopoly. Neither it can guarantee any operator any fixed share of business of Broadband, landline or TV. This is decided by residents and market dynamics

Therefore we have little choice but to independently operate intercom service and we have to pay minimal installation and subscription charges which are on par or below the general market standard. But because we bought more Broadband competition, the subscription rates are constantly going southward or better packages are being offered, which compensates the monthly intercom tariff many times over. And this trend will only continue while intercom tariff at best will stay constant or even decline with scale and passage of time,