I just implemented on all my sites Google plus 1+
High re#*$!ion pictures on my sites are now locked.
The user has to 1+ a page from a propoal list, after this he can follow the link to the high resolution pictures.
Unlocking additional content seems to be covered by the 1+ TOS.
But what's about tracking users and their 1+ behavior?
For example to require that 10% of the visited pages have to be 1+.
When somebody is so long on a site to read 10 pages, I assume he is so interested, that he should at alst give one page a 1+.
And here should the 1+ discussion start.
Within TOS or against TOS?