It really depends on your site. Google policy is officially against "thin" adsense and affiliate sites. Most likely they use some percentage of original content to determine "thin". Minimum bids for "thin" affiliate marketers will lift to the sky. You should have at least a couple of real content pages to build "fat enough" site and avoid problems.
Google says:
"We differentiate between affiliates that produce
extra service, value, or content, and those that
simply are duplicates of other sites, set up to
boost traffic to other sites and earn a commission
for it. The former ones are not Offensive and
should be rated on the merits to the query. The
latter ones are Offensive..."
"Thin affiliate doorways are sites that usher
people to a number of Affiliate programs, earning
a commission for doing so, while providing little
or no value-added content or service to the user.
A site certainly has the right to try to earn income;
we're attempting to identify sites that do nothing
but act as a commission-earning middleman."
"Do not call a page affiliate spam when an
affiliation is only incidental to the message
and purpose of a website. To determine whether
participation in affiliate programs is central
or incidental to the site's existence, ask
yourself this question: Would this site remain
a coherent whole if the pages leading to the
affiliate (merchant) were taken away?"
The same approach applies to Adsense and arbitrage of all sorts.
