Selling tickets thru StubHub: Marketing implications of driving traffic to secondary reseller site, etc.

Good morning! I am looking for arts centers selling non-theatrical tickets (not BWY inventory) via Stub Hub. What % of your tickets do you make available through Stub Hub? How has that impacted your "ownership" of keywords related to your venues, productions, brand? If you have a Google Ad grant, have you seen it take any additional hit in light of secondary markets being able to use your keywords with a per-click budget higher than the Ad Grant allows? I am curious to know the multi-year impact of this behavior...as in the short term one may be making a sale, but are diluting your web traffic and cookie pools for future marketing + remarketing efforts. We also just spend considerable $$$ on a new website that launches in the next week - and it feels "wrong" to drive traffic away from it. Who ultimately OWNS the ticket buyer information? With Groupon, they retain buyer info...which weakens our database value over time. Appreciate any insight the Tessitura community can provide.Christine