AviancaTaca LifeMiles is also offering bonus of double miles for online purchases made through their online shopping mall between November 21 and 26 for purchases over $50. You can access this offer here.
Not sure why, but I keep getting all the communication from LifeMiles in Spanish. I was able, however, to find the same info on their LifeMiles website in English as well.
You should compare the straight cashback rates that number of online shopping portals are offering to LifeMiles rates and then make a decision, whether cash or miles are a better choice.
I have not made any purchases through LifeMiles relatively new online shopping portal. If their cashback rates in LifeMiles miles are competitive, don’t have a reason why I couldn’t try them out.