First you need to set your priorities and objective in life. And then you need to ask questions to yourself before jumping on to any conclusion.
I suggest you to join there. You've gud reasons to do so, if you analyze it carefully.
a) you are in BPO. You may not earn gud experience as a trainer being in BPO. You may not even get a chance to grow yourself.
b) You are a process trainer. You may be restricted to the same pattern / syllabus course for months. And as a trainer you need to expand your wings.
c) You are getting a chance as AM - training. You are getting growth in terms of designation and job profile. And I am sure in terms of remunerations too.
d) You are opening a new door. You are getting a chance to experience a whole new world of working (BPO's work style is entirely different from any corporate body). I can say this for I've worked in both the environment.
However, it's you who has to decide. So, take decisions after pondering over all the points.
All the Best!!!
If it's Bharatmatrimony, grab it pal. The company has been attracting top-notch and highly qualified professionals in India. In fact, I have a cousin working for Bharatmatrimony and he is all praise for the company. He says it's the fastest growing and the most innovative company in the online space in India. Bharatmatrimony is the flagship but Consim which runs it is also into several other verticals including jobs, real estate etc. If you are looking for a company to help you grow and thrive in a stimulating, challenging and fun environment with world class features, Bharatmatrimony is the place for you!
Hope this helps.