As an expansion to T144592, we should increase the number of indexed article placeholders on cywiki ten times and make 10,000 placeholders indexable.
The current very limited trial gives us some hints about the number of spider requests performed (currently we get 100-450 per day). If they increase linearly with the number of indexable placeholders, we would get something between 1,000 and 4,500 requests per day (sum for all cywiki placeholders). Part of the point in increasing the number of indexed placeholders is to see whether this actually happens.
Given this also brings even more focus on the placeholders, there are some tasks we (at least potentially) should fix before going with this.