I am running bettinginfos.com , and up to this moment the site has around 76 000 pages, which are mostly betting tips for single matches, written by our users. May be having so many similar pages is damaging my position in google for some betting keywords, and may be I have to reduce the number of this pages?
Oh yes it is very bad practice to have the same metadata on multiple pages.
Apart from that having many pages does not penalize you at all - on the contrary.
The important thing is that you have a sitemap that helps search engines find/index them all
To help you remember: "One sitemap to find them all and in the engine bind them"_____________Free hosting