What do think about the online companies on internet that do hang outs in google+ to offer English classes either paid or free?

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Sorry for the mistake that I did in my question: I try to say:

What do you think about the online companies on internet that do hang outs in google+ to offer English classes either paid or free?

Sites like: http://www.colingo.com/

or: https://es.verbling.com/

What do you think about them?

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