New changes in PTC BOX.

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While logging in PTC BOX for clicking on the ads, as I am a member of the site, I came across an announcement by the site. It is all about the changes that are going to be effective in the site within a week of announcement by the site.Can any one suggest which would be the ideal time for upgrade of membership- before or after the changes are made effective by the site? Do you consider the upgrade of membership essential for earning more from the site or do you think that the upgrade would not make any significant difference as far as earning from the site is concerned? An immediate response is essential as the offer is going to be over very shortly.