What is the scope in a job and field like BPO/Chat process?
I prefer to go with this company only in case I have cross the age limit or even unable to apply for Govt jobs in the near future etc. Anyhow, if the client and BPO company is good then one can enjoy the perks beside PF and other little luxury benefit, and it is not sure that client may extend the contract in the near future or BPO company may help you to change the process.
Is BPO a good career option?
Something is better than nothing, when I was working in the BPO company for temporary period, I observed that other colleagues used to attend some Central Govt and State Govt interviews and got their jobs too. BPO is good for the one who don't get immediate right jobs, so, you can use few months or 1+ year effectively to learn about various thing, including, email/chat, voice and semi-voice process, multi-cultural environment, temporary night shifts or afternoon shifts and other perks etc.
What happens after he gets old, after a certain age - doesn't it become difficult for most people who currently work in this sector?
See friend, you have to save money while you working on this sector and try to move smartly on-time for either business or other senior post in well known private company at least to secure yourself/career. This revenue would help you to spend more than what you earning just because of the atmosphere, so, be careful on this.
I know that having experience in KPOs and back offices is certainly beneficial and can help you get a good job...but chat process?
Yes, Chat process (like Gtalk/Hangout) too helps for getting various knowledge, typing speed increase, knowledge increase and benefit too once you cross the certain duration.
Will experience in it count?
Yes, it counts for getting jobs in similar BPO industry only and definitely helps this nature of work in different industry if you don't show the experience except rough work experience or NIL experience to get jobs in a complete different organization.