I would stay well away from doing the above in terms of SEO. If you were going to do anything with the 50 domains, you would have been in a much better situation if they were on separate c-class IPs with private registration.

Interlinking these sites or creating a link pyramid are likely to (at best) have little or no SEO effect. However, you could link together if the different sites provide different value propositions for the visitor.

It may be a good time to consolidate some of these sites, more than 50 quality sites would be fairly difficult and costly to maintain.

Hi Paulina.

I agree with Ruslan in terms of whether it is OK from a ranking perspective.

However, it is critical to remember that your meta data has another important objective - to entice searchers to click through to your page.

A well written meta description makes a considerable difference to click-through rates.

Consider spending as long on your page meta data as you would when trying to write an effective Adwords Ad.

In consideration of this objective (maximising click through rates), you may find that the first sentence or two of your body copy would not suffice as an effective meta description.

cheers, David.