Madonna is OK. I am not a fanboy, but she has a certain amount of credibility as a singer and songwriter. More credibility for example than pretenders like Kylie Minogue, Pink and Lady Gaga.
As for pandering to the gay community to get them to buy her songs, I don't think she needs that kind of financial assistance, and I am certainly not going to criticise her for stating that gay people are entitled to equality in society. I actually think it's more a case of the gays, particularly a certain gay demographic, tending to support that kind of music and flamboyant presentation. It's always mystified me why the vast majority of gay men seem to favour female artists, some almost exclusively. Witness the love for Madonna, Barbra Streisand, Grace Jones, Kylie Minogue, Tina Turner, Lady Gaga etc. in the gay commmunity. I really cannot think of any male artists who are gay icons in the same way, except for The Village People.