see
http://www.phparcadescript.com/ where it says that 2700 games in total come with the package
(which i think is a cheap bargain)
if you know nothing about webmastering (like me) then i would pay the extra fee to have the site uploaded for you, and the extra fee to have all the games uploaded for you, if you want their game package
if you want mochi games on your site,
then you will want to decide if you want the non-mochi games that are included with the purchse
or if you only want mochi games on your site, in which case you can decide if you you want the 2700 non-mochi games, or not
as far as SEO, you can make modifications for meta words in your site set-up, and also on the overall.html page of your template
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if you, like me, know nothing about site set-up, then i would spend a few dollars to hire someone from this site or other sites to set up your game site fo you
others here .... please correct any of my mistakes
thanmk you