It can take time for new pages to be indexed. Until they are, indexed pages virtually don't exist. Use IndexCheckr to know when your new pages get indexed.
Pages can get deindexed because of an unintentional change like a bad robot meta tag. Search engines can also deindex pages and this is a very bad sign. Monitor your pages and be reassured this does not happen.
If your links are placed on pages that are not indexed, they have no SEO value. Double check that all your links have value. Show your clients the links you acquired for them are good.
Do you have a list of pages you would like to place a link to? Use IndexCheckr to check if these pages are indexed before putting in any effort.
Buy credits as you need. No recurring costs. Manage your spending easily. 1 check = 1 credit.
If a page is not indexed, the tool checks if its domain is indexed. This does not cost extra credit.
Schedule your pages to be checked at a fixed interval.
Clear pricing. Get cheaper price per credit with bigger packages. As low as $0.0015 per check.